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Author: Kevin Ryan Yuhan, MD, Attending Physician, Southern California Permanente Medical Group (SCPMG)

Kevin Ryan Yuhan is a member of the following medical societies: Alpha Omega Alpha, American Academy of Ophthalmology, American Society of Cataract and Refractive Surgery, and International Society of Refractive Surgery

Coauthor(s): Timothy You, MD, Consulting Surgeon in Ophthalmology, Private Practice

Editors: Anastasios J Kanellopoulos, MD, Assistant Program Director, Clinical Associate Professor, Department of Ophthalmology, Manhattan Eye, Ear, and Throat Hospital, New York University; Simon K Law, MD, PharmD, Assistant Professor of Ophthalmology, Jules Stein Eye Institute; Chief of Section of Ophthalmology Surgical Services, Department of Veterans Affairs Healthcare Center, West Los Angeles; Christopher J Rapuano, MD, Professor, Department of Ophthalmology, Jefferson Medical College; Co-Chairman of the Cornea Service, Co-Chairman of Refractive Surgery Department, Wills Eye Hospital; Lance L Brown, OD, MD, Ophthalmologist, Affiliated With Freeman Hospital and St John's Hospital, Regional Eye Center, Joplin, Missouri; Hampton Roy Sr, MD, Associate Clinical Professor, Department of Ophthalmology, University of Arkansas for Medical Sciences

Author and Editor Disclosure

Synonyms and related keywords: Kaposi's sarcoma, KS, idiopathic multiple pigmented sarcoma, endemic Kaposi sarcoma, transplant-related Kaposi sarcoma, epidemic Kaposi sarcoma, AIDS-related Kaposi sarcoma, ocular complications of AIDS, ophthalmic Kaposi sarcoma, ocular tumors, conjunctival tumors, conjunctival lesions, eyelid lesions, vascular tumors

Background

In 1872, Kaposi was the first to report an idiopathic, multiple-pigmented sarcoma of the skin that predominantly affected elderly men of Mediterranean or Ashkenazi ancestry. This classic type has an indolent course and commonly presents on the lower extremities.

Since the original description, 3 additional forms have been described. Endemic Kaposi sarcoma is prevalent in central Africa, primarily affecting young men with aggressive skin and visceral lesions. Transplant-related Kaposi sarcoma has been reported in patients with renal transplants on immunosuppressive therapy. Epidemic Kaposi sarcoma, better known as AIDS-related Kaposi sarcoma, commonly affects homosexual males with AIDS. Prior to the AIDS epidemic of 1981, fewer than 25 reported cases of ophthalmic Kaposi sarcoma existed in the literature.

Pathophysiology

Whether the 4 variants of Kaposi sarcoma represent the same disease process or different processes that manifest the same end-stage lesion is unclear. Although the etiology has not been elucidated, the human herpesvirus 8 (HHV-8) has been implicated. In 1994, Chang et al identified this virus in more than 90% of patients with AIDS-related Kaposi sarcoma.

Frequency

United States

Prior to 1981, fewer than 25 reported cases of ophthalmic Kaposi sarcoma existed in the literature. Currently, the overwhelming majority of ophthalmic Kaposi sarcoma is AIDS related. In 1986, the Centers for Disease Control and Prevention (CDC) reported that Kaposi sarcoma occurs in approximately 24% of patients with AIDS and 35% of all homosexual men with AIDS. The CDC reported that during the period from 1992-1997, Kaposi sarcoma occurred in 23.8% of males with AIDS and 27.4% of all homosexual men with AIDS. During the same time period, only 2.3% of women with AIDS developed Kaposi sarcoma.

Ophthalmic involvement occurs in 20-24% of patients with AIDS-related Kaposi sarcoma. Ophthalmic presentation was the initial manifestation of AIDS-related Kaposi sarcoma in 4-12% of patients. Eye lesions are neither an early nor a late manifestation of Kaposi sarcoma. A review of the literature reports that most eye lesions involve the conjunctivae or eyelids; 10-75% of patients have conjunctival lesions, and 25-80% of patients have eyelid lesions.

In recent years, the incidence of Kaposi sarcoma among HIV patients has declined significantly, from 60.6% in 1992 to 19.7% in 1997. The exact cause for this decline is unclear, but the introduction of protease inhibitors, combination HIV therapy, and safer sexual practices may have played significant roles.

Mortality/Morbidity

  • Systemic Kaposi sarcoma
    • Tumors have been linked to significant mortality and morbidity. Kaposi sarcoma can disseminate to visceral organs (ie, lungs, liver, adrenal glands, kidneys, bone marrow, gastrointestinal tract).
    • Bowel obstruction, lower extremity edema, shortness of breath, hemorrhage, and pain have been reported.
    • Visceral and lung involvement usually portends a poor prognosis.
  • Ophthalmic Kaposi sarcoma
    • Generally, ophthalmic Kaposi sarcoma is indolent.
    • Ocular tumor growth can result in severe damage to the ocular adnexa and the ocular surface.
    • Involvement of the eyelids can cause significant disfigurement and lid dysfunction. Trichiasis can develop from mechanical ectropion or entropion. Lagophthalmos and trichiasis can result in profound irritation and dryness, infections, and corneal scarring. Large lid tumors can induce irregular corneal astigmatism. Conjunctival involvement may result in recurrent subconjunctival hemorrhages.
    • Ultimately, vision could be lost from lid dysfunction, corneal surface changes, or visual obstruction.

Race

  • Classic Kaposi sarcoma usually involves elderly men with Mediterranean or Ashkenazi ancestry.
  • Endemic Kaposi sarcoma usually involves young black males from central Africa.
  • Transplant- or AIDS-related Kaposi sarcoma has no racial preference.

Sex

  • Classic Kaposi sarcoma usually involves elderly men.
  • Endemic Kaposi sarcoma usually involves young males.
  • AIDS-related Kaposi sarcoma predominantly involves homosexual males.

Age

  • Classic Kaposi sarcoma affects the older population.
  • Endemic Kaposi sarcoma affects children with a male-to-female ratio of 1:1; after puberty, males predominantly are affected.
  • AIDS-related Kaposi sarcoma usually affects males aged 20-49 years.



History

  • Identify risk factors for Kaposi sarcoma. The clinician should ask about the following:
    • Demographics
    • Immune status
    • Previous skin lesions
    • Previous treatment for Kaposi sarcoma
    • History of opportunistic infections
    • Current medication use
  • Symptoms of Kaposi sarcoma include the following:
    • Pain
    • Photophobia
    • Recurrent red or bloody eyes
    • Irritation and foreign body sensation
    • Epiphora
    • Dry eyes
    • Mucopurulent discharge
    • Heavy or swollen eyelids
    • Cosmetic disfigurement of the eyelids
    • Eyelashes rubbing against the eyes
    • Inability to close the eyes
    • Visual obstruction
    • Blurred vision

Physical

  • Full ocular examination should include the following:
    • Inspect and evert the eyelids and lashes.
    • Perform slit lamp biomicroscopy.
    • Examine palpebral and bulbar conjunctivae and fornices in detail.
    • Palpate the lacrimal gland, and examine for masses.
    • Examine both eyes for proptosis in the rare likelihood of orbital involvement. Fortunately, intraocular Kaposi sarcoma has never been reported.
  • The lesions are purplish red to bright red and highly vascular with surrounding telangiectatic vessels. They may be macular, plaquelike, or nodular.
  • Dugel et al described 3 clinical stages that may help direct therapy.
  • Stage I and II tumors are patchy and flat. These lesions have a thickness of less than 3 mm in vertical height and are younger than 4 months.
  • Stage III tumors are nodular and elevated with a vertical height of greater than 3 mm. They tend to be older than 4 months.
  • Ophthalmic Kaposi sarcoma lesions are found on the eyelids, conjunctiva, caruncle, and lacrimal sac. They rarely are found inside the orbit.
  • Of ophthalmic Kaposi sarcoma cases, 6-16% are eyelid lesions, and the superior and inferior eyelids tend to be involved equally.
  • Of ophthalmic Kaposi sarcoma cases, 7-18% are conjunctival lesions. Many conjunctival lesions tend to involve the inferior conjunctiva and fornix.
  • Lesions tend to be indolent, but, as the tumor grows, it can alter ocular adnexal structures and the ocular surface. The mass effect of the tumor on the eyelids can cause mechanical ectropion or entropion with trichiasis and lagophthalmos and irregular astigmatism.
    • Ectropion or entropion can result in poor lid apposition, trichiasis, and lagophthalmos. Consequently, the patient may experience epiphora, poor tear clearance and drainage, recurrent corneal abrasions, pain and discomfort, foreign body sensation, dry eyes, and photophobia.
    • Long-standing trichiasis and exposure can result in corneal infection, scarring, and opacification.
  • Rarely, tumor bulk may block the visual axis by ptosis or direct obstruction. Tumor bulk may even prevent the complete closure of the eyelid.
  • Conjunctival involvement may present with subconjunctival hemorrhage, injection, and chemosis.

Causes

  • HHV-8 has been implicated.
  • Homosexual males with HIV are at an increased risk. This risk is increased markedly with the number of partners.
  • Patients who have had organ transplants and use immunosuppressive agents and steroids are at an increased risk.
  • Elderly males of Mediterranean or Ashkenazi ancestry are at an increased risk.



Basal Cell Carcinoma, Eyelid
Blepharitis, Adult
Cellulitis, Orbital
Hemangioma, Cavernous
Hordeolum
Subconjunctival Hemorrhage

Other Problems to be Considered

Foreign body granuloma
Lymphangioma
Conjunctival cyst
Inflamed pinguecula
Pyogenic granuloma
Allergic reaction
Infection
Eyelid edema
Sebaceous carcinoma
Amelanotic melanoma
Disseminated cryptococcal infection



Lab Studies

  • HIV enzyme-linked immunosorbent assay
  • HIV Western blot

Imaging Studies

  • Imaging studies are generally not necessary, unless orbital or disseminated Kaposi sarcoma is suspected.

Procedures

  • Cutaneous or conjunctival biopsy of the lesion may be necessary for a definitive diagnosis.

Histologic Findings

All 4 variants of Kaposi sarcoma demonstrate similar histologic findings of tissue, containing endothelium-lined vascular channels and proliferation of spindle-shaped cells surrounded by inflammatory cells. Often, an increased angiogenesis with erythrocyte extravasation is present. Dugal et al described 3 histologic types of Kaposi sarcoma, which probably represents different stages along a continuum.

Type I

  • Thin, dilated vascular channels are lined by flat endothelial cells with lumen-containing erythrocytes. The cells have flat endothelial fusiform nuclei and scanty cytoplasm.
  • Moderate mononuclear cell infiltrate surround these abnormal vessels.
  • No spindle cells or slit spaces are observed.

Type II

  • Plump, fusiform endothelial cells line thin, dilated empty vascular channels. Many of these cells have hyperchromatic nuclei.
  • The inflammatory infiltrate of macrophages, plasma cells, and lymphocytes is sparse.
  • Foci of a few immature spindle cells and early slit vessels are present.

Type III

  • Large aggregates of densely packed spindle cells with hyperchromatic nuclei, occasional mitotic figures, and abundant slit spaces often contain erythrocytes.
  • Inflammatory cells are scant.



Medical Care

The goal of therapy is to relieve ocular irritation, mass effect, and disfigurement. Therapy is not curative. If the patient has no ophthalmic complaints, the tumor usually is observed. For AIDS-related Kaposi sarcoma, consider immune reconstitution with triple antiviral medication.

Kaposi sarcoma tends to respond to chemotherapy. Ophthalmologists may want to delegate the use of chemotherapy to a chemotherapist or an oncologist familiar with the use of the agents. If the patient has systemic involvement that requires chemotherapy, the eye lesion often resolves or is reduced markedly after starting this therapy. However, recurrence commonly follows after discontinuation of chemotherapy. If local treatment is indicated, defer for at least 4 weeks after systemic chemotherapy to allow for regression of the lesions.

  • Conventional Adriamycin, bleomycin sulfate, and vinblastine sulfate (ABV) combination therapy
    • Doxorubicin hydrochloride (Adriamycin) 40 mg/m2 q4wk or 20 mg/m2 q2-3wk
    • Bleomycin sulfate 10 U/m2 q2wk
    • Vinblastine sulfate 1.4 mg/m2 with 2 mg maximum dose q2wk has been recommended with ABV combination therapy. See Medication.
  • Single agent therapies
    • Liposomal daunorubicin (DaunoXome) 40 mg/m2 IV q2wk until complete response; the response is comparable to ABV but with less resultant neutropenia.
    • Pegylated liposomal doxorubicin (Doxil) 20 mg/m2 q3wk; the response is comparable to ABV or BV but with either lower or similar neutropenia risk.
    • Liposomal anthracyclines have a prolonged half-life when compared to their unencapsulated counterparts.
  • Alternative therapies
    • Paclitaxel (Taxol) 135 mg/m2 IV over 3 h q3wk or a total dose of 100 mg/m2 given IV over 3 h q2wk. All patients should be premedicated with the following 3 medications to prevent hypersensitivity reactions:
      • Dexamethasone 10 mg PO 12 h before treatment
      • Diphenhydramine 50 mg IV 30 min prior to treatment
      • Cimetidine or ranitidine IV 30 min before treatment
    • If the absolute neutrophil count is greater than 1,000 cells/mm3, then continue with treatments. Reduce the dose of subsequent treatments by 20% if the neutrophil count falls below 500 cells/mm3.
    • Other chemotherapeutic agents used in Kaposi sarcoma include etoposide (VePesid), dactinomycin (Cosmegen), cisplatin (Platinol), and interferon alfa-n3 (Alferon N).
  • Intralesional chemotherapy: Interferon alfa-2a 0.5 cc of 3 million IU subconjunctival injection adjacent to the tumor was reported by Hummer et al to be efficacious in a 46-year-old man with AIDS-related conjunctival Kaposi sarcoma.
  • Investigational medications
    • Human chorionic gonadotropin–associated factors
      • Since males are at a higher risk for developing Kaposi sarcoma, some investigators believe that female hormones may play a protective role. Hermans et al experienced complete or partial regression of skin lesions in 38% of patients with AIDS-related Kaposi sarcoma after intralesional injections of human chorionic gonadotropin (hCG).
      • Sammaniego et al demonstrated that human chorionic gonadotropin–associated factors (HAF) can induce apoptosis of Kaposi sarcoma cells in vivo and in vitro.
    • Iron chelators
      • Simonart et al currently is investigating the role of regulating iron concentration in tumor cells. They demonstrated that the addition of iron salts strongly stimulates the growth of Kaposi sarcoma and that the use of iron chelators inhibits growth. Their findings are disclosing new therapeutics in tumor management with iron-chelating agents.
      • Hermans et al speculate that the lower risk for developing Kaposi sarcoma in females may be because women have lower iron stores. He also believes that patients with renal transplants are more susceptible to Kaposi sarcoma because they tend to have higher iron loads from repeated blood transfusions.
      • Other experimental medications include fumagillin analogues (AGM 1470), bacterial cell-wall peptidoglycan (SP-PG derivatives), interleukin-4 (IL-4), and L-glutamine-tryptophan.
      • Intralesional cidofovir (an antiherpetic medication) injections have demonstrated poor results. Bailey et al have reported that all-trans-retinoic acid has not demonstrated optimistic results.
    • Irradiation
      • Most patients respond immediately to radiation therapy, but recurrence commonly occurs. Consequently, irradiation is used primarily as a palliative measure.
      • A typical treatment includes 2,000-3,000 cGy with the total dose given in fractions of 200-300 cGy per session over 3 weeks.
      • Ocular complications of radiation include lid atrophy, skin necrosis, ectropion, telangiectasia, tearing, eyelash loss, keratitis, cataract formation, conjunctival keratinization, skin erythema, keratoconjunctivitis sicca, alopecia, optic neuropathy, and lid notching.

Surgical Care

  • Cryotherapy protocol
    • Subcutaneous injection of 2% lidocaine with epinephrine applied directly under the lesion is administered.
    • Cryoprobe with circulating liquid nitrogen is set at -30°C.
    • Cryoprobe is applied to the tumor and extended out to 1-2 mm of clear margin until the lesion becomes bright white.
    • Antibiotic ointment is applied to the treated site.
    • Follow-up care is arranged for the following day.
    • Ocular complications of cryotherapy include depigmentation and erythema, lid notching, and epilation.
  • Surgical excision
    • Indications for local excision include cosmetically disturbing lesions, discomfort, and obstruction of vision from tumor bulk. Consider treating a lesion to prevent entropion formation with trichiasis and exposure keratopathy and corneal ulcer.
    • Protocol for local excision
      • A cotton swab is soaked in 0.5% tetracaine hydrochloride, then applied directly over the tumor.
      • Lidocaine 2% with epinephrine is injected subconjunctivally with a 25-gauge needle.
      • Westcott scissors are used for blunt and sharp dissection to free the tumor. Clear margins of 1-2 mm are excised.
      • The specimen is marked for orientation.
      • Antibiotic ointment is applied, and the eye is patched.
      • Patient should receive follow-up care the next day.
    • Protocol for fluorescein angiography demarcation of conjunctival lesions
      • A 5 cc bolus of fluorescein dye is injected intravenously and photographed using a Zeiss SE-40 blue exciter filter.
      • The fluorescein angiography is used to mark tumor vessels with heat cautery.
  • Conjunctival tumors
    • Dugal et al recommended an effective treatment regimen based on the clinical and histopathologic stage of the tumor.
    • If the lesion is stage I or II and confined to the bulbar conjunctiva, excisional biopsy with 1-2 mm of clear margins is suggested.
    • For stage III tumors involving the bulbar conjunctiva, surgical excision guided by fluorescein angiography delineation of tumor margins resulted in no lesion recurrence during 4-8 months of follow-up care.
  • Eyelid tumors
  • Stage I and II lesions may be treated with cryotherapy. Stage II lesions may require radiation therapy.
  • Recurrence usually occurs within 4 weeks after surgical excision.

Consultations

  • If an eye lesion is identified, a thorough workup is necessary to rule out systemic involvement and HIV/AIDS infection.
  • After a thorough ophthalmologic examination, refer to an internist or oncologist/chemotherapist.
  • Disseminated Kaposi sarcoma may necessitate bronchoscopy, sigmoidoscopy, or lymph node biopsy for a definitive diagnosis and systemic chemotherapy.



Most ophthalmologists may want to delegate the administration of chemotherapeutic agents to chemotherapists or oncologists. The medical therapy for disseminated Kaposi sarcoma consists of either ABV combination or liposomal daunorubicin alone. Liposomal doxorubicin usually is reserved for those patients who fail ABV combination or who are intolerant to ABV therapy. Other second-line therapies include the use of paclitaxel and interferon alfa-n3.

Drug Category: Antineoplastics

Inhibit cell growth and proliferation.

Drug NameVinblastine sulfate (Velban)
DescriptionAlkaloid extract of Catharanthus roseus. FDA indications for use of vinblastine are Kaposi sarcoma, choriocarcinoma, histiocytosis X, lymphocytic lymphoma, mycosis fungoides, breast carcinoma, and testicular carcinoma.
Mechanism of action is to arrest growing cells in metaphase by inhibiting formation of microtubule assembly during spindle formation.
For treatment of Kaposi sarcoma, ABV is conventional combination treatment used.
Major route of elimination is through excretion. A small portion is eliminated through urine.
Main route of administration is IV.
Adult Dose3.7 mg/m2 IV initially; subsequent weekly doses can be increased by 1.8 mg/m2; maintenance dose should be set at 1 increment less than the dose producing the WBC count of 3000 cells/mm3; subsequent doses should not be given weekly until WBC count returns to >4000 cells/mm3
Pediatric Dose2.5 mg/m2 IV initially; subsequent weekly increments of 1.75 mg/m2 IV are given
ContraindicationsDocumented hypersensitivity; bone marrow suppression; granulocytopenia; underlying bacterial infections; hepatic insufficiency
InteractionsPhenytoin plasma levels may be reduced when administered concomitantly with vinblastine; with mitomycin, the toxicity of vinblastine may significantly increase
PregnancyD - Unsafe in pregnancy
PrecautionsCaution in patients diagnosed with impaired liver function and neurotoxicity; when patient is receiving mitomycin C, monitor closely for shortness of breath and bronchospasm; adverse effects include aspermia, stomatitis, neurologic toxicity, alopecia, constipation, and hypertension; draw a complete blood count weekly before each planned dose; no increase should be made once the WBC count is approximately 3000 cells/mm3

Drug NameBleomycin sulfate (Blenoxane)
DescriptionCytotoxic glycopeptide extracted from a strain of Streptomyces verticillus. Commonly used in combination with Adriamycin and vinblastine. Inhibits DNA, RNA, and protein synthesis. Major route of elimination is through urine. Serum concentrations may increase in patients with poor creatinine clearance.
Adult Dose0.25-0.5 U/kg (10-20 U/m2) given IV q2wk
Pediatric DoseNot established
ContraindicationsDocumented hypersensitivity; significant renal function impairment; compromised pulmonary function
InteractionsMay decrease plasma levels of digoxin and phenytoin; cisplatin may increase toxicity of bleomycin when administered systemically
PregnancyX - Contraindicated in pregnancy
PrecautionsCaution in renal impairment; possibly secreted in breast milk; may cause mutagenesis and pulmonary toxicity (10%); idiosyncratic reactions similar to anaphylaxis (1%) may occur; monitor for adverse effects during and after treatment; vasoocclusive phenomenon with distal necrosis of digit; permanent damage to nail matrix may occur; before administering treatment, test for anaphylactoid reaction by giving 2 U for first 2 doses

Drug NameDoxorubicin hydrochloride (Adriamycin, Doxil)
DescriptionCytotoxic anthracycline extracted from Streptomyces peucetius. Not FDA approved for the treatment of Kaposi sarcoma but often used in combination with bleomycin and vinblastine.
Mechanism of action is by intercalation of anthracycline with DNA. Subsequently, this blocks DNA and RNA polymerases, resulting in the inhibition of cell growth and proliferation. Major route of elimination is via biliary excretion.
Adult Dose40-60 mg/m2 IV q3-4wk; reduce dose based on degree of hyperbilirubinemia; if plasma bilirubin 1.2-3 mg/dL, give 50% lower dose; if 3.1-5 mg/dL, give 75% lower dose

Liposomal dosage form: 20 mg/m2 IV over 30 min q3wk; adjust dose based on toxicity; if absolute neutrophil count <1000 cells/mm3 and/or platelets <50,000 cells/mm3, wait until absolute neutrophil count is >1000 and/or platelets are >50,000; subsequent dose should be reduced by 25%; if absolute neutrophil count <500 and/or platelets fall <25,000, wait until neutrophil count is >1,000 and/or platelet counts >50,000; subsequent dose should be reduced by 50%

Pediatric DoseNot established
ContraindicationsDocumented hypersensitivity; severe heart failure; cardiomyopathy; impaired cardiac function; preexisting myelosuppression
InteractionsMay decrease phenytoin and digoxin plasma levels; phenobarbital may decrease plasma levels of doxorubicin; cyclosporine may induce coma or seizures; mercaptopurine increases toxicity of doxorubicin; cyclophosphamide increases cardiac toxicity of doxorubicin
PregnancyD - Unsafe in pregnancy
PrecautionsIrreversible cardiac toxicity and myelosuppression may occur; extravasation may result in severe local tissue necrosis; reduce dose in patients with impaired hepatic function

Drug NameDaunorubicin citrate liposome (DaunoXome)
DescriptionAnthracycline antibiotic extracted from S peucetius. Indicated for treatment of Kaposi sarcoma. Liposomal version of daunorubicin greatly enhances functional characteristics of the treatment by decreasing plasma clearance and a smaller volume of distribution. Characteristics translate into longer drug exposure. Daunorubicin is a first-line drug for advanced HIV-Kaposi sarcoma. Not recommended for mild involvement.
Adult Dose40 mg/m2 IV q2wk; reduce dose by 25% if serum bilirubin is 1.2-3 mg/dL and by 50% if > 3 mg/dL
Pediatric DoseNot established
ContraindicationsDocumented hypersensitivity; heart failure; arrhythmias or cardiopathy
InteractionsNone reported
PregnancyD - Unsafe in pregnancy
PrecautionsExtravasation may result in severe tissue necrosis; caution in impaired hepatic, renal, or biliary function; adverse effects include myelosuppression; potential cardiotoxicity; potential carcinogenesis, mutagenesis, alopecia, and impairment of fertility; repeat CBCs prior to each scheduled dose; suspend treatment if absolute granulocyte count <750 cells/mm3

Drug NamePaclitaxel (Taxol)
DescriptionExtract of Taxus baccata. Indicated for second-line treatment of AIDS-related Kaposi sarcoma. Mechanism of action is to promote polymerization of microtubules and to inhibit depolymerization. Prevention of microtubule dynamics results in the inability of the cell to undergo mitosis. Major route of elimination is through hepatic clearance. All patients should be premedicated with dexamethasone 10 mg PO 12 h before treatment, diphenhydramine 50 mg IV 30 min prior to treatment, and cimetidine or ranitidine IV 30 min before treatment.
Adult Dose135 mg/m2 IV over 3 h q3wk or total dose of 100 mg/m2 given IV over 3 h q2wk
If ANC >1,000 cells/mm3, continue same regimen; reduce dose of subsequent treatments by 20% if ANC falls <500 cells/mm3
Pediatric DoseNot established
ContraindicationsDocumented hypersensitivity to paclitaxel or polyoxyethylated castor oil; peripheral neuropathy; bone marrow suppression; liver failure; severe cardiac disease; AIDS-related Kaposi sarcoma with baseline ANC of <1,000 cells/mm3; do not retreat until ANC recovers to >1,000 cells/mm3 and platelets recover to level >100,000 cells/mm3
InteractionsRetinoic acid, ketoconazole, verapamil, diazepam, quinidine, dexamethasone, cyclosporine, teniposide, testosterone, etoposide, vincristine, 17-alpha-ethinyl estradiol, and protease inhibitors (ritonavir, saquinavir, indinavir, and nelfinavir) may increase toxicity; coadministration with cisplatin may further increase myelosuppression
PregnancyD - Unsafe in pregnancy
PrecautionsPerform frequent blood cell counts to monitor occurrence of neutropenia; severe cardiac conduction abnormalities during paclitaxel infusion reported in <1% of patients; if cardiac symptoms occur, monitor cardiac function with subsequent infusions; adjust dose for hepatic insufficiency
Adverse reactions include bone marrow suppression, hypersensitivity reaction, bradycardia, hypotension, abnormal ECG patterns, peripheral neuropathy, myalgia, arthralgia, nausea, vomiting, diarrhea, alopecia, and hepatic impairment

Drug Category: Interferons

Are naturally produced proteins with antiviral, antitumor, and immunomodulatory actions. Alfa, beta, and gamma interferons may be given topically, systemically, and intralesionally.

Drug NameInterferon alfa-2a (Roferon A), alfa-2b (Intron A), alfa-n3 (Alferon N)
DescriptionDerived from pooled units of human leukocytes induced by Sendai virus. Human sources of leukocytes are screened carefully for infectious agents (Sendai virus, HIV-1, HTLV-I, HBV, HSV-1, CMV, and EBV).
FDA indication is for condyloma acuminata. Off-label uses include bladder carcinoma, ovarian epithelial carcinoma, renal carcinoma, chronic active hepatitis, AIDS-related Kaposi sarcoma, chronic myelocytic leukemia, hairy cell leukemia, non-Hodgkin lymphoma, malignant melanoma, multiple myeloma, mycosis fungoides, laryngeal papillomatosis, essential thrombocytosis, and carcinoid tumors.
Interferons are secreted normally by cells in response to viral infections. Binding of interferon to receptors initiates of cascade of events that ultimately involves inhibition of viral replication, suppression of mitosis, and other enhancements to the immune system.
Dose of interferon alfa will vary depending on type and brand chosen. SC route is recommended in those with coagulopathies.
Adult DoseInterferon alfa-n3: Subconjunctival or subcutaneous intralesional injection with 0.05 cc (250,000 IU) to 0.5 cc (2.5 million IU) using a 30-gauge needle with a tuberculin syringe; injection can be administered twice a week for up to 8 wk

Interferon alfa-2a: Recommended induction dose is 36 million IU qd IM/SC for 10-12 wk; recommended maintenance dose is 30-36 million IU 3 times/wk; may require reduction in dose for intolerance; treatment period is governed by extent of tumor response and tolerance to adverse reactions

Interferon alfa-2b: Recommended dose is 30 million IU/m2 SC/IM 3 times/wk; maintain dose unless severe intolerance; dose reduction may be necessary for severe reactions

Pediatric DoseNot established
ContraindicationsDocumented hypersensitivity to mouse immunoglobulin (IgG), egg protein, or neomycin
InteractionsPotential risk of renal failure when administered concurrently with IL-2; theophylline may increase interferon alfa toxicity by reducing clearance; cimetidine may increase antitumor effects of interferon alfa; zidovudine and vinblastine may increase toxicity of interferon alfa
PregnancyC - Safety for use during pregnancy has not been established.
PrecautionsDepression and suicidal ideation may be adverse effects of treatment; severe or fatal GI hemorrhage has been reported infrequently in association with alfa interferon therapy; prior to initiation of therapy, perform tests to quantitate peripheral blood hemoglobin, platelets, granulocytes, hairy cells, and bone marrow hairy cells; monitor periodically (eg, monthly) during treatment to determine response; if a patient does not respond within 6 mo, discontinue treatment; if a response occurs, continue treatment until no further improvement is observed and laboratory parameters have been stable for about 3 mo; not known whether continued treatment after that time is beneficial



Further Outpatient Care

  • Patients should have routine ophthalmic examinations; the frequency depends on the severity of eye involvement.
    • Most eye lesions can be observed.
    • Severe eye discomfort, disfigurement, and dysfunction indicate a need for local treatment.

In/Out Patient Meds

  • Most eye lesions are simply observed.

Complications

Prognosis

  • Ophthalmic Kaposi sarcoma has an indolent course. Most lesions are observed.

Patient Education

  • Instruct patients about the risk of HIV because Kaposi sarcoma may be the initial manifestation of AIDS.
  • Educate patients about the importance of routine ophthalmologic examinations.



Medical/Legal Pitfalls

  • Kaposi sarcoma may be the initial manifestation of AIDS. Discovery of any Kaposi lesions without a significant clinical history of other medical problems warrants a referral to an internist for thorough evaluation for HIV or other immunocompromised conditions.
  • Most ophthalmologists should delegate the use of chemotherapy to an oncologist/chemotherapist because of the lack of familiarity with the antineoplastic agents.



Media file 1:  Section of eyelid with Kaposi sarcoma lesion under high magnification. This tissue section demonstrates increased angiogenesis and spindle-shaped cells. Courtesy of Ben Glasgow, MD, University of California, Los Angeles, Department of Ophthalmology, Jules Stein Eye Institute.
Click to see larger pictureClick to see detailView Full Size Image
Media type:  Photo

Media file 2:  Section of eyelid with Kaposi sarcoma lesion under high magnification. This tissue section demonstrates endothelium-lined vascular channels and proliferation of spindle-shaped cells. Increased angiogenesis with erythrocyte extravasation is observed. Courtesy of Ben Glasgow, MD, University of California, Los Angeles, Department of Ophthalmology, Jules Stein Eye Institute.
Click to see larger pictureClick to see detailView Full Size Image
Media type:  Photo

Media file 3:  The inferior conjunctiva is involved more commonly than the superior conjunctiva in Kaposi sarcoma. Courtesy of Gary N Holland, MD, University of California, Los Angeles, Department of Ophthalmology, Jules Stein Eye Institute.
Click to see larger pictureClick to see detailView Full Size Image
Media type:  Photo

Media file 4:  Kaposi sarcoma involvement of the eyelid. Courtesy of Gary N Holland, MD, University of California, Los Angeles, Department of Ophthalmology, Jules Stein Eye Institute.
Click to see larger pictureClick to see detailView Full Size Image
Media type:  Photo



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Kaposi Sarcoma excerpt

Article Last Updated: Feb 1, 2007