Bladder outlet obstruction is a recognized urological condition especially in aging males who may have prostate enlargements from benign or malignant lesions or when infra-vesical obstruction is due to urethral stricture in relatively younger subjects. Ultrasound scan is an integral tool in confirming suspected pathologies and also revealing incidental findings which could be life-threatening in some and of no effect in others. We retrospectively studied 156 patients who presented for follow up in the urology clinic with abdomino-pelvic ultrasound scan results. The mean age of the patients was 65.10(35-91) years. They were all males. Urinary bladder abnormalities consisted of increased bladder wall thickness (BWT) in 90(87.4%) patients, post void residual volume (PVRV) was abnormal in 31 (68.9%) patients and bladder stone was seen in 6 (3.8%) patients. The prostate gland was also evaluated with abnormal findings as follows: Prostate volume in 143(92.3%) patients, prostate outline was irregular in 50(32.1%) patients, the later finding showed a statistically significant association with the diagnosis of prostate cancer. Seminal vesicles were dilated bilaterally in 10(62.5%) out of 156 patients. The upper tract abnormalities were also noted and discussed. Abdomino¬-pelvic ultrasound scan just like trans-rectal ultrasound scan is very useful in assessing patients suspected of bladder outlet obstruction (BOO) with the added advantage of being able to visualize the upper tracts with the same probe. It is quite safe, quick, affordable and without risk of contrast allergy and radiation exposure