You are in: eMedicine Specialties > Urology > Infections and Related Inflammatory Conditions Hemorrhagic Cystitis: NoninfectiousArticle Last Updated: Sep 10, 2007AUTHOR AND EDITOR INFORMATIONAuthor: Joseph Basler, MD, PhD, Chief, Section of Urology, Audie Murphy Veterans Affairs Hospital; Professor, Department of Urology, University of Texas Health Science Center at San Antonio Joseph Basler is a member of the following medical societies: American Urological Association, Society for Basic Urologic Research, Society of University Urologists, Society of Urologic Oncology, and Southwestern Oncology Group Coauthor(s): Jennifer J Lucas, MD, Staff Physician, Department of Urology, University of Texas Health Science Center at San Antonio Editors: Bradley Fields Schwartz, DO, FACS, Associate Professor of Urology, Director, Center for Laparoscopy and Endourology, Department of Surgery, Southern Illinois University School of Medicine; Francisco Talavera, PharmD, PhD, Senior Pharmacy Editor, eMedicine; Mark Jeffrey Noble, MD, Consulting Staff, Urologic Institute, Cleveland Clinic Foundation; J Stuart Wolf, Jr, MD, FACS, David A Bloom Professor of Urology, Director, Division of Minimally Invasive Urology, Department of Urology, University of Michigan Medical Center; Stephen W Leslie, MD, FACS, Founder and Medical Director of the Lorain Kidney Stone Research Center, Clinical Assistant Professor, Department of Urology, Medical College of Ohio Author and Editor Disclosure Synonyms and related keywords: hematuria, cystitis, radiation cystitis, irradiation cystitis, chemical cystitis, infectious hemorrhagic cystitis, noninfectious hemorrhagic cystitis, cyclophosphamide chemotherapy, iphosphamide chemotherapy, pelvic irradiation, pelvic radiation, industrial chemical exposure, radiation-induced hemorrhagic cystitis, drug-induced hemorrhagic cystitis, gross hematuria, microscopic hematuria, diffuse hematuria, urinary retention, oxazaphosphorine-alkylating agents, isophosphamide, mesna, penicillin, aniline derivatives, toluidine derivatives, chlordimeform, ether, bacterial cystitis, silver nitrate irrigation, alum irrigation, epsilon aminocaproic acid, Amicar, hypogastric artery embolization, selective hypogastric branch artery embolization, Boon syndrome, high-altitude air travel, Salmonella typhi, sodium pentosan polysulfate, amifostine, acrolein, danazol, busulfan, thiotepa, temozolomide, bleomycin, tiaprofenic acid, allopurinol, methaqualone, methenamine mandelate, gentian violate, nonoxynol-9suppositories, intravesical acetic acid INTRODUCTIONHemorrhagic cystitis is defined as an infectious or noninfectious process that leads to gross hematuria originating in the urinary bladder. Infectious causes include bacterial and viral etiologies. The various noninfectious causes are the topic of this discussion. ProblemNoninfectious hemorrhagic cystitis most commonly occurs in patients who have undergone pelvic radiation, chemotherapy, or both. Affected patients may develop microscopic hematuria without any symptoms or gross hematuria with clots, leading to urinary retention. Treatment depends on the etiology, severity of the bleeding, and symptoms. Rarely, arteriovenous malformations, stones, metastatic tumors, and, more commonly, urothelial malignancies manifest as gross hematuria. These are differentiated from hemorrhagic cystitis with imaging and during endoscopic evaluation. FrequencyHemorrhagic cystitis occurs in up to 70% of patients exposed to high doses of cyclophosphamide or iphosphamide chemotherapy and up to 15% of patients who undergo pelvic irradiation to treat malignancy. However, over the last several years, newer irradiation techniques have decreased the incidence of hemorrhagic cystitis to approximately 10% of treated patients. EtiologyNoninfectious hemorrhagic cystitis is an inflammation of the bladder associated with hematuria. Patients usually present with urgency, frequency, dysuria, and, in some cases, abdominal discomfort. Although the causes of noninfectious hemorrhagic cystitis vary, this condition most commonly develops as a complication of pelvic radiation or from toxicity related to the use of certain chemotherapeutic drugs (eg, cyclophosphamide, iphosphamide). Less commonly, exposure to certain industrial chemicals, such as aniline or toluidine derivatives, can cause hemorrhagic cystitis. Although rare, drugs such as penicillins or danazol can also precipitate hemorrhagic cystitis. Other extremely rare reports include associations with food poisoning (Salmonella typhi) and prolonged high-altitude air travel (Boon disease). Regardless of the perceived circumstance, an infectious etiology should be sought as part of the initial assessment, even in the setting of radiation or chemical exposure, as infection may serve as an exacerbating factor. Bacterial, fungal, parasitic, and especially viral bladder infections in immunocompromised patients are often complicated by hemorrhagic cystitis. Radiation-Induced Hemorrhagic CystitisNearly one fourth of patients who undergo pelvic radiation develop bladder-related complications. Slightly less than 50% of these patients develop diffuse hematuria. These patients usually have undergone radiation therapy for cancer of the prostate, colon, cervix, or bladder. Urgency, frequency, dysuria, and stranguria may develop acutely during radiation, or these symptoms may begin months to years after completion of radiotherapy. The symptoms of radiation cystitis are caused by a microscopic progressive obliterative endarteritis that leads to mucosal ischemia. The ischemic bladder mucosa then ulcerates and bleeding ensues. Neovascular ingrowth to the damaged area then occurs, causing the characteristic vascular blush on cystoscopic evaluation. The new vessels are more fragile and may leak with bladder distension, minor trauma or any mucosal irritation. Submucosal hemorrhage and overt hematuria may then begin precipitously. Acute episodes of radiation cystitis wane within 12-18 months in most patients following radiation therapy. As expected, the higher the dose and the wider the field encompassed by the radiation exposure, the more likely the sequelae of radiation cystitis. Patients who have undergone pelvic radiation are at an increased risk for radiation cystitis if additional radiotherapy is performed because of the cumulative dose effect. Infection, bladder outlet obstruction, and instrumentation are all factors that can exacerbate radiation cystitis. Drug-Induced Hemorrhagic CystitisChemotherapeutic drugs The oxazaphosphorine-alkylating agents cyclophosphamide and ifosfamide are chemotherapeutic drugs that are useful in the treatment of lymphoma, leukemia, and certain solid tumors. These drugs are also commonly administered as conditioners prior to bone marrow transplantation. Unfortunately, the toxicity of these drugs is not insignificant, and many of the adverse effects are urologic. Both microscopic and gross hematuria can result from the use of cyclophosphamide. The incidence of urologic adverse effects varies from 2-40%, and the toxicity is dose-related. Cyclophosphamide itself is not toxic; the drug's toxicity is due to its hepatic conversion to the metabolite acrolein, which is excreted in the urine and causes bladder edema and bladder hemorrhage. Over time, chronic bladder damage manifests as fibrosis with decreased capacity, trabeculations, and telangiectasias. The adverse effects of cyclophosphamide are more likely due to increased bladder exposure to acrolein. Thus, patients receiving cyclophosphamide should always receive good hydration, and a Foley catheter is often placed to ensure immediate drainage of the bladder. Continuous bladder irrigation is sometimes recommended to hasten the clearance acrolein from the bladder. Penicillins Rarely, penicillins have been known to cause hemorrhagic cystitis in certain patients. Case reports have implicated methicillin, carbenicillin, ticarcillin, piperacillin, and penicillin VK. Most cases of hemorrhagic cystitis in patients who took extended-spectrum penicillins have been reported in those with cystic fibrosis who had previously received penicillin antibiotics. Symptoms can take up to 2 weeks to develop after the drug is started; when symptoms occur, the best treatment is to discontinue the offending drug immediately. Hemorrhagic cystitis in patients taking penicillins is thought to be caused by an immune-mediated hypersensitivity. Examination of the urine frequently reveals eosinophils. Danazol Treatment with danazol, a semisynthetic anabolic steroid, has caused hemorrhagic cystitis in patients with hereditary angioedema. Interestingly, the advent of hemorrhagic cystitis in these patients followed years of symptom-free treatment with danazol. Hematuria developed after 30-77 months of treatment in one study. In almost all cases, the hematuria resolved after cessation of danazol. The dose of danazol did not correlate with the severity of hemorrhagic cystitis. The etiology of hemorrhagic cystitis in patients being treated with danazol is unclear. Other medications that have been implicated in the development of hemorrhagic cystitis in limited reports include busulfan, thiotepa, temozolomide, bleomycin, tiaprofenic acid, allopurinol, methaqualone, methenamine mandelate, gentian violate, nonoxynol-9 suppositories, and intravesical acetic acid. Other Causes of Noninfectious Hemorrhagic CystitisEnvironmental factors Cases of hemorrhagic cystitis with no infectious etiology have been reported in patients whose occupation puts them in contact with certain urotoxic chemicals such as aniline (found in dyes, marking pens, and shoe polish) and toluidine (found in pesticides and shoe polish) derivatives. In these cases of hemorrhagic cystitis, the patient's exposure to the chemicals is usually work-related. Hemorrhagic cystitis due to these derivatives is self-limiting, and cessation of the exposure usually suffices for cure. Exposure to these chemicals also increases the risk of transitional cell carcinoma; thus, the workup for gross hematuria should reflect this possibility. Chlordimeform The pesticide chlordimeform is commonly used on cotton plants and fruit trees, and ingestion, inhalation, or skin contact with this chemical can cause hemorrhagic cystitis. The toxicity of chlordimeform is likely due to the fact that one of its metabolites, 2-methylaniline, is an aniline derivative. The hemorrhagic cystitis caused by chlordimeform is self-limiting, although whether these exposures increases the risk of bladder cancer is unknown. Ether Ether has been injected into the balloon ports of Foley catheters in an attempt to clear clogged ports and to deflate them, but this compound has an extremely toxic effect on the bladder. Balloons invariably rupture, and ether cystitis results in acute hematuria; long-term sequelae may include decreased capacity and irritative voiding symptoms. Vaginal products A chemical hemorrhagic cystitis can develop when vaginal products are inadvertently placed in the urethra. Gentian violet douching to treat candidiasis has resulted in hemorrhagic cystitis when the drug was misplaced in the urethra, but this hemorrhagic cystitis resolved spontaneously with cessation of treatment. Accidental urethral placement of contraceptive suppositories has also caused hemorrhagic cystitis in several patients. The bladder irritation was thought to be caused by contact of the acidic compound nonoxynol-9 (pH, 3.35) with the bladder. In the acute setting, the bladder can be copiously irrigated with alkalinized normal saline to minimize bladder irritation. PathophysiologySee Etiology. ClinicalPatients who present with hemorrhagic cystitis usually have a history of radiation or chemical exposure, and they are often inpatients or well known to their respective services. The presence or absence of clotted blood is not completely helpful in determining the etiology of hemorrhagic cystitis, but the presence of long stringy clots suggests an upperurinary tract etiology. Symptoms include suprapubic discomfort, urinary frequency, and inability to empty the bladder due to the clots. Upon examination, the patient often demonstrates suprapubic fullness and discomfort or pain to palpation, as well as costovertebral angle tenderness if the bladder obstruction is chronic. Differential diagnoses The differential diagnoses include the following:
In males, prostatic varices may also be an underlying etiology of gross hematuria. A history of trauma or recent manipulation of the urinary system (eg, catheterization, cystoscopy) suggests another etiology.INDICATIONSSurgical intervention other than cystoscopy with cauterization is reserved for cases in which medical management fails. In extreme cases, when all other treatment options have failed, selective or superselective hypogastric branch artery embolization can be considered (see Surgical therapy). RELEVANT ANATOMYThe bladder anatomy relevant to noninfectious hemorrhagic cystitis includes an appreciation of the layers from the lumen outward. The glycosaminoglycan (GAG) layer coats the inner surface over the transitional epithelium. Deep to this transitional epithelium, the bladder submucosa with its microvasculature overlies the detrusor muscle. A layer of fatty connective tissue surrounds most of the anterior and lateral bladder in the space of Retzius, while posteriorly, the peritoneal serosal surface separates it from the cul-de-sac and abdominal cavity contents. In cases of chronic cystitis, neovascularity in the submucosal area is often seen and is presumably the site of acute hemorrhage. Ischemic changes of endarteritis can lead to mucosal ulcerations and acute hemorrhage. WORKUPLab Studies
Imaging StudiesIn general, the evaluation of any patient with gross hematuria should include an assessment of the upper urinary tracts (in descending order of helpfulness, intravenous pyelography, CT scanning [without and with contrast], renal ultrasonography). When only renal ultrasonography or noncontrast CT scanning is performed, retrograde intravenous pyelography may be necessary to further evaluate the upperurinary tract urothelium. Even if upper urinary tract lesions are identified, a bladder etiology for hematuria should be suspected and then checked with cystoscopy. Diagnostic ProceduresCystoscopy, with or without retrograde pyelography, is indicated in all cases of hemorrhagic cystitis. Often, cystoscopic clot evacuation is necessary to allow close inspection of the urothelium. Even in situations in which clots are initially removed with hematuria catheters, an endoscopic inspection is essential in planning treatment and in preventing future episodes. Histologic FindingsChronic inflammation is the most common finding on a bladder biopsy specimen. TREATMENTMedical therapyRegardless of the cause of noninfectious hemorrhagic cystitis, treatment follows the same course. Urine cultures should always be obtained to eliminate the possibility of bacterial cystitis. Elimination of the agent predisposing the patient to cystitis is paramount. In the absence of clots and if the patient is voiding well, hydration with careful observation may be the only treatment required. If the patient demonstrates difficulty with urination, clots are likely occluding the bladder outlet. A large, stiff-walled hematuria catheter with wide holes is the best choice for initial clot evacuation. Initial irrigations may be performed manually with sterile water, which helps to lyse red blood cells and clots. Continuous bladder irrigation with normal saline is started after clots are cleared. If irrigation of the bladder to clear the clots is not possible, cystoscopy with clot evacuation under anesthesia and antibiotic coverage are necessary. Fulguration of bleeding sites and biopsies of suspicious areas may be performed at that time. Although continuous bladder irrigation with saline solution cannot replace manual irrigation for removal of the clots, it can be helpful in preventing further clotting. Persistent hematuria may be treated with bladder irrigation with carboprost, 1-2% alum, or silver nitrate. Alum and silver nitrate, which are astringents, work by forming precipitates over the bleeding surfaces of the bladder wall. These agents are not significantly absorbed through an intact bladder wall but may enter the circulation under pressure through open veins. Rarely, alum irrigation causes encephalopathy and acidosis in patients with renal insufficiency, in whom serum aluminum level monitoring is advisable. Both agents are somewhat caustic to the bladder, and alum can cause bladder wall necrosis and even perforation. Because alum and silver nitrate irrigations are not without risk, the importance of constant monitoring to ensure low-pressure bladder irrigation is paramount and may warrant an ICU setting. One drawback to alum irrigation is that it imparts a leathery consistency to any clot present in the bladder at the time of irrigation, thus precluding easy clot evacuation. Epsilon aminocaproic acid (Amicar) can also be used, either orally or parenterally, to limit intravesical bleeding. This drug works by inhibiting clot lysis by urinary urokinase. Amicar is contraindicated in patients with upper–urinary tract bleeding because it can cause extremely dense clots, resulting in ureteral obstruction. These clots are also often difficult to manually evacuate through a catheter; thus, evacuation via cystoscopy or cystotomy in the operating room may be required. Carboprost tromethamine (prostaglandin F2 [Hemabate], Pharmacia) is an FDA-approved medication for uterine bleeding and induction of second-trimester abortion. It induces smooth-muscle contraction in blood-vessel walls and has been used off-label for bladder irrigation in the treatment of hemorrhagic cystitis due to cyclophosphamide. The main advantages of carboprost are that it is easy to use and does not cause bladder pain with irrigation. Other prostaglandins have also been used intravesically or parenterally in the treatment of pain associated with hemorrhagic cystitis. Commonly used vasodilatory prostaglandins include prostaglandin E1 and prostaglandin E2. These agents cause vasodilation, which improves blood flow to the bladder wall, and presumably decrease pain because of their anti-inflammatory properties. These agents are expensive, and their efficacy in bleeding reduction is marginal. In severe refractory cases of hemorrhagic cystitis, formalin can be instilled in the bladder. Formalin coagulates the bleeding bladder surface by hydrolyzing and cross-linking proteins. Prior to installation, reflux into the ureters must be assessed with cystography. Formalin must not reflux into the upper urinary tracts because this reflux can cause irreversible fibrosis, papillary necrosis, or ureteral obstruction. If present, reflux can be mitigated by placement of occlusive balloon catheters in the distal ureters prior to proceeding. A 2.5-4% formalin solution is instilled in the bladder and left for up to 30 minutes, after which the bladder is meticulously irrigated with continuous bladder irrigation. Intravesical formalin instillation must be performed with the patient under anesthesia because it is excruciatingly painful. Although radiation-induced hemorrhagic cystitis cannot be prevented at this time, encouraging research with sodium pentosan polysulfate is ongoing. This compound resembles heparin and may prove to be uroprotective. Amifostine (Ethyol) has been used with mixed results in preventing radiation damage, and its use should still probably be limited to clinical trials. Amifostine is prodrug that is dephosphorylated by alkaline phosphatase to a pharmacologically active free thiol metabolite, which, in studies of head and neck cancer, is believed to be responsible for the reduced renal toxicity of cisplatin and reduced side effects of radiation on the normal oral tissues. The active thiol metabolite is thought to scavenge reactive oxygen species generated in irradiated cells. Amifostine is thought to protect the normal tissues since they have higher pH, higher alkaline phosphatase activity (and produce more active metabolite), and better vascularity than the tumor tissue. Chemotherapy-induced hemorrhagic cystitis Cyclophosphamide toxicity can be minimized with the concurrent use of drugs such as N-acetylcysteine (Mucomyst) and 2-mercaptoethane sulfonate (mesna). Both of these drugs bind to acrolein, creating stable thioester compounds with no bladder toxicity. Because it decreases the chemotherapeutic efficacy of cyclophosphamide, Mucomyst is less desirable than mesna, which is generally not reported to decrease the efficacy of cyclophosphamide. Mesna can be given either orally or intravenously, and its routine concurrent administration has been recommended in the treatment of patients receiving cyclophosphamide and ifosfamide chemotherapy. In patients receiving cyclophosphamide who develop hemorrhagic cystitis, discontinuation of mesna is recommended. Unfortunately, mesna is much more successful at preventing than treating active bleeding. Even if hemorrhagic cystitis does not develop during the use of cyclophosphamide, the patient’s lifetime risk of developing bladder cancer is increased 9-fold after receiving the agent. Mesna administration may decrease this risk. Viral cystitis In immunosuppressed patients with viral hemorrhagic cystitis, decreased immunosuppression and the use of antiviral agents (cidofovir, vidarabine, ribavirin) administered orally, intravenously, or intravesically is recommended. Treatment with continuous bladder irrigation and clot evacuation is implemented as in other causes of hematuria.Surgical therapyIntervention to eliminate the influence of urokinase on the clots in the bleeding bladder in the form of percutaneous nephrostomies or other supravesical diversions has been met with mixed success. Because as many as half of patients who undergo urinary diversion later require cystectomy, bladder removal at the time of diversion should be strongly considered. In extreme cases, when all other treatment options have failed, selective hypogastric branch artery embolization can be considered. This surgical procedure is associated with a low success rate because most cases are associated with diffuse venous bleeding that cannot be controlled with embolization. Intravesical balloons to tamponade the vessels have resulted in some transient improvement; however, the therapy is not widely accepted. In milder cases of irradiation cystitis, hyperbaric oxygen treatments may offer some degree of palliation. Urinary flow diversion via percutaneous nephrostomy tube placement is often successful, presumably because this decreases the exposure of the nascent clots to urokinase, a potent clotting inhibitor in urine. Often, permanent urinary diversion (ie, ileal conduit, colon conduit, cutaneous ureterostomy) is necessary to prevent future hemorrhagic episodes. Cystostomy for vesical installation and cystotomy with temporary packing of the bladder or with use of the argon beam coagulator have been described as successful measures. Cystectomy may be necessary to control pain but may be avoided in some patients once the urine stream is diverted. Cystectomy poses a significant risk because the patient is usually compromised from chemotherapy or radiation therapy. Neobladder creation and continent catheterizable pouches from uninvolved bowel segments are options in certain patients but are not generally considered in patients who have undergone radiation therapy or in whom renal insufficiency is an issue. Complications are discussed below. Preoperative detailsPrior to urinary diversion and cystectomy, culture-directed antibiotics or preoperative second-generation cephalosporins are usually administered after a mechanical bowel preparation. The latter is accomplished with oral sodium phosphate (Fleets Phosphosoda) or a polyethylene glycol electrolyte solution (GoLYTELY, NuLYTELY) with enemas on the evening prior to surgery. Oral erythromycin base and neomycin are also administered upon completion of the mechanical bowel preparation to minimize peritoneal contamination when the bowel is entered for creation of the conduit or substitute. Intraoperative detailsRadical cystectomy to manage cancer usually involves anterior exenteration female patients and cystoprostatectomy in male patients. However, for benign causes (eg, hemorrhagic cystitis), a more conservative approach can be used. The so-called simple cystectomy is accomplished in the standard fashion, but the removal of the ovaries, fallopian tubes, uterus, and anterior vagina in female patients can be avoided if desired. Similarly, prostatectomy in male patients may be avoided if indicated by anatomical concerns or a desire for cavernosal nerve sparing (erectile nerve preservation) or neobladder creation. The choice of conduit material (eg, ileum, sigmoid colon, transverse colon) depends on the underlying etiology of the cystitis. In cases of radiation cystitis, a transverse colon conduit may be the best option since it is generally out of the radiation field. The ureters must be taken well above the bladder to avoid implanting an ischemic irradiated ureter in the conduit. The latter often requires the creation of a longer conduit than would otherwise be performed. This, in turn, may lead to other metabolic consequences (eg, hyperchloremic metabolic acidosis) that must be considered postoperatively.Postoperative detailsStabilization of hematocrit levels is the rule. Electrolyte abnormalities may supervene if preoperative renal insufficiency was present. Postoperative care is similar to that in other patients who have undergone cystectomy. Follow-upAs noted, longer conduits and bladder substitutions require close follow-up and monitoring for sequelae of metabolic acidosis that may accompany these diversions. Vitamin B-12 deficiency and steatorrhea have been reported in patients in whom the distal ileum and ileocecal valve were used for diversion. COMPLICATIONSComplications are unusual for patients with chemical cystitis, but wound problems, urinary anastomotic strictures and leaks, and bowel anastomosis problems are more common in patients who have undergone a urinary diversion procedure after radiation therapy. OUTCOME AND PROGNOSISIn general, cystitis due to chemical exposure can be expected to resolve after discontinuation of the agent and irrigation/fulguration. Conversely, radiation cystitis tends to recur for months or even years after completion of radiotherapy. Seemingly minor events, such as urinary tract infection or bladder distension, may trigger florid hemorrhage. Close follow-up with periodic urinalysis and urine C&S and aggressive management may prevent recurrences.FUTURE AND CONTROVERSIESRecent advances in the management of bleeding related to soft-tissue trauma, including argon beam coagulators, activated thrombin agents (eg, Evicel, FloSeal, Hemaseal), and angiogenesis inhibitors (for irradiation cystitis), may lead to new treatments that will hopefully lessen the need for cystectomy. FURTHER READINGRecent review: Rastinehad A, Kavoussi L, Noble M. Hemorrhagic Cystitis. AUA Update Series. 2007;26(Lesson 7):66-75. MULTIMEDIA
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