Hi, Thanks for writing in. Prostate cancer is confirmed by doing certain tests specific to the prostate gland. At first the serum PSA level is important and if this is high then the patient is recommended for a transrectal ultrasound of prostate. This will show any suspicious lesions. Any lesion in the peripheral zone of prostate is to be biopsied and this biopsy is done under ultrasound guidance. A little bit of tissue from the suspicious region is taken out with a needle and sent to the lab to study the cells. Only if there are cancer cells then a diagnosis of cancer is established. Once a patient is confirmed with caner of prostate, it is better to do a bone scan and ultrasound abdomen and chest X ray to know the spread of disease. If there is no spread and the tumor is smaller than 3 cm in size then it is in first stage. Terazosin is a drug prescribed for the treatment of symptoms due to an enlarged prostate caused by benign prostatic hypertrophy. Please do not worry.