Bladder Cancer Specialists  Arie Belldegrun, MD Jean B. deKernion, MD Mark S. Litwin, MD, MPH Allan Pantuck, MD, MS, FACS Robert E. Reiter, MD Robert B. Smith, MD Ongoing Clinical Trials No Current Trials... Related Research Projects Research Studies into Bladder Cancer

General Information

The bladder is an organ located in the pelvic cavity that stores and discharges urine. Urine is produced by the kidneys, carried to the bladder by the ureters, and discharged from the bladder through the urethra. Bladder cancer accounts for approximately 90% of cancers of the urinary tract (renal pelvis, ureters, bladder, urethra).

Types

Bladder cancer usually originates in the bladder lining, which consists of a mucous layer of transitional epithelial cells (surface cells that expand and deflate), smooth muscle, and a fibrous layer. The tumor is categorized as low stage (superficial) or high stage (muscle invasive).

In industrialized countries (e.g., United States, Canada, France), more than 90% of cases originate in the transitional epithelial cells (called transitional cell carcinoma; TCC). In developing countries, 75% of cases are squamous cell carcinomas caused by Schistosoma haematobium (parasitic organism) infection. Rare types of bladder cancer include small cell carcinoma, carcinosarcoma, primary lymphoma, and sarcoma.

Incidence and Prevalence

According to the National Cancer Institute, the highest incidence of bladder cancer occurs in industrialized countries such as the United States, Canada, and France. Incidence is lowest in Asia and South America, where it is about 70% lower than in the United States.

Incidence of bladder cancer increases with age. People over the age of 70 develop the disease 2 to 3 times more often than those aged 55-69 and 15 to 20 times more often than those aged 30-54.

Bladder cancer is 2 to 3 times more common in men. In the United States, approximately 38,000 men and 15,000 women are diagnosed with the disease each year. Bladder cancer is the fourth most common type of cancer in men and the eighth most common type in women. The disease is more prevalent in Caucasians than in African Americans and Hispanics.

Causes and Risk Factors

Cancer-causing agents (carcinogens) in the urine may lead to the development of bladder cancer. Cigarette smoking contributes to more than 50% of cases, and smoking cigars or pipes also increases the risk. Other risk factors include the following:

• Age
• Chronic bladder inflammation (recurrent urinary tract infections, urinary stones)
• Consumption of Aristolochia fangchi (herb used in some weight-loss formulas)
• Diet high in saturated fat
• Exposure to second-hand smoke
• External beam radiation
• Family history of bladder cancer (several genetic risk factors identified)
• Gender (male)
• Infection with Schistosoma haematobium (parasite found in many developing countries)
• Personal history of bladder cancer
• Race (Caucasian)
• Treatment with certain drugs (e.g. cyclophosfamide - used to treat cancer)

• Hairdressers
• Machinists
• Printers
• Painters
• Truck drivers
• Workers in rubber, chemical, textile, metal, and leather industries

The primary symptom of bladder cancer is blood in the urine (hematuria). Hematuria may be gross (visible to the naked eye) or microscopic (visible only under a microscope) and is usually painless. Other symptoms include frequent urination and pain upon urination (dysuria).

Diagnosis

Diagnosis of bladder cancer includes urological tests and imaging tests. A complete medical history is used to identify potential risk factors (e.g., smoking, exposure to dyes). Laboratory tests may include the following:

• Urinalysis (to detect microscopic hematuria)
• Urine cytology (to detect cancer cells by examining cells flushed from the bladder during urination)
• Urine culture (to rule out urinary tract infection)

If bladder cancer is suspected, cystoscopy and biopsy are performed. Local anesthesia is administered and a cystoscope (thin, telescope-like tube with a tiny camera attached) is inserted into the bladder through the urethra to allow the physician to detect abnormalities. In biopsy, tissue samples are taken from the lesion(s) and examined for cancer cells. If the sample is positive, the cancer is staged using the tumor, node, metastases (TNM) system.

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Bladder Cancer and UCLA

Bladder Cancer and Reconstruction

Patients suffering from cancer of the lower urinary tract or who have severe neurologic conditions affecting the bladder have new options for bladder reconstruction. In association with the Division of Urologic Oncology, we have developed new surgeries that provide continent reservoirs, eliminating the need for these patients to wear collective devices for the rest of their lives. We have developed techniques in which a small piece of intestine is used to create a new bladder at the time the patient undergoes the cancer operation. In this fashion a neobladder--or new bladder-- is created and connected to the urethra, allowing for normal voiding and continence. We have so far performed 163 such procedures with excellent results and dramatic improvements in patient's quality of life. In addition, some patients can also benefit from a continent urinary reservoir providing another option for urinary diversion.