Bladder tumors in males are characterized by excessive cell growth in the walls of the bladder, according to About.com. Most are not malignant and are wart-like growths called papillomas.
Symptoms of bladder tumors include an urgent need to pass urine, weight loss, appetite loss and blood in the urine, states About.com. Bladder tumors are common in men over the age of 50, with less than 1 percent occurring in those who are 40 years old or younger. Approximately 4 percent of all cancers in the United States are tumors that occur in the lining of the bladder.
Bladder cancer is two to three times more common in men and more prevalent in industrialized countries. Cancerous tumors are staged as low stage and superficial or more invasive and high stage, as noted by HealthCommunities.com.