Bladder Cancer in Pakistan: Risk Factors, Diagnosis, and Management
Bladder cancer is a growing problem in our country. It is the fourth most common cancer in males and the fifteenth most common in females in Pakistan. Unfortunately, due to poor record-keeping, the true incidence and prevalence of this disease are not known. The Karachi Cancer Registry, established in 1995, and the Aga Khan University cancer surveillance program, started in 2000, are the primary organizations tracking this data. Shaukat Khanum Memorial Cancer Hospital in Lahore also publishes its own cancer registry.
Risk Factors for Bladder Cancer
The main risk factor for bladder cancer is cigarette smoking. The risk is directly related to the number of cigarettes smoked per day and the total years of smoking. Bladder cancer risk also increases with age. Other risk factors include exposure to certain hair dyes and working in industries that produce rubber, leather, and paint materials. Exposure to specific drugs—particularly those used to treat other cancers—may also increase the risk. Conversely, a healthy lifestyle, adequate fluid consumption, and a diet rich in fruits are protective factors.
Urinary System and its Main Function
The bladder is part of the urinary system, and its main function is to store and excrete urine. It is lined by a specialized layer of cells that prevents the absorption of waste products from urine. Bladder cancer arises from this inner lining of the bladder wall; as it grows, it can progress deep into the muscle. Like other cancers, if left unattended, it can spread outside the bladder to various other organs.
Blood in the Urine
Bladder cancer differs from many other cancers due to its high recurrence rate, which largely depends on the tumor grade. Well-differentiated (low-grade) cancers carry a much lower risk of recurrence compared to poorly differentiated (high-grade) tumors.
Gross hematuria (visible blood in the urine) is the cardinal symptom of bladder cancer. Patients may also present with lower urinary tract symptoms, such as increased voiding frequency, urgency, or difficulty voiding.
Early Diagnosis and Investigations
Initial diagnostic investigations must include a routine urine test and an ultrasound examination. In most cases, a cystoscopy—an endoscopic examination of the bladder—should also be performed. Once a diagnosis is established, additional tests such as CT or MRI scans are required for proper disease staging.
In most cases, initial treatment involves an endoscopic resection performed at the time of diagnosis. A critical aspect of bladder cancer management is the accurate evaluation of the cancer stage via biopsy, followed by the design of a long-term surveillance program. Because of the high recurrence rate, patients require close follow-up through repeated endoscopic examinations. The interval between these examinations is determined by the specific type and grade of the cancer.
Early diagnosis and regular follow-up are essential to managing this cancer effectively. All cases of gross hematuria must be promptly investigated, particularly in patients over 40 years of age of both sexes. In males, any degree of hematuria at any age should not be ignored. Antibiotics or other medications play no role in early curative treatment. If neglected and allowed to spread outside the bladder, the disease becomes untreatable; at an early stage, however, it is not only treatable but potentially curable.
Advanced Bladder Cancer Cases
In more advanced cases where the cancer remains localized to the organ, the entire bladder must be removed (cystectomy). In these instances, urinary diversion is provided either through a prominent incontinent stoma on the abdominal wall or an internal bladder replacement (neobladder). An internal bladder is constructed from the small intestine and, in most cases, functions similarly to a natural bladder.
Public health education, primary prevention through smoking cessation, and increasing the availability of specialized healthcare professionals are key factors in reducing incidence and preventing deaths from this cancer.