Anatomy ◼ Adenomas can develop anywhere in the colon or rectum but are seen with the greatest frequency in the sigmoid colon. ◼ The frequency of polyp occurrence in each section of the colon is approximately as follows: rectum 15%;…
Anatomy ◼ The arterial supply of the small bowel is predominantly from the celiac axis and superior mesenteric artery (SMA). ◼ The inferior mesenteric artery (IMA) and the internal iliac arteries may become important contributors in the setting of arterial…
The Adrenal Glands With the increasing use of cross-sectional imaging, adrenal lesions are frequently identified in routine practice and are seen in up to 5% of abdominal computed tomograph (CTs). Recent lung-screening data report 2% of screening low-dose CTs demonstrate…
Upper Tract Urothelial Carcinoma Definition Upper tract urothelial carcinoma (UTUC) refers to malignant changes of the uroepithelial cells lining the urinary tract anywhere from the renal calyces to the ureteral orifice. Epidemiology Urothelial carcinoma is relatively common worldwide, and its…
Congenital Anomalies Normal Development Detailed embryological development of the kidneys and ureters will not be described in detail. The kidney precursors initially develop in the pelvis and ascend to their normal positions lateral to the proximal lumbar spine by 8…
Haematuria Haematuria refers to the presence of red blood cells in urine. Radiological referral of selected patients is often necessary as part of clinical management for this problem; however, the optimal method of patient selection and the best imaging algorithm…