Forty-four cases of abdominal and pelvic computerized tomography (CT) for urological evaluation were reviewed and analyzed as follows: Computerized tomography is a very convenient and non-invasive method to evaluate stages of renal tumor and is more superior in diagnosing hypoplastic kidney and hamartoma than ordinary renal angiography and ultrasonography. Computerized tomography is more informative in evaluation of retroperitoneal space than conventional radiography. It is almost impossible or very difficult to differentiate stage of the bladder tumor A, B1 and B2. Stages beyond C and mass in the pelvic cavity can be detected with relative accuracy. Lymph node metastasis into the retroperitoneal space in testis tumor is diagnosed by computerized tomography.
Angiography ; Hamartoma ; Kidney ; Lymph Nodes ; Neoplasm Metastasis ; Radiography ; Retroperitoneal Space ; Testis ; Ultrasonography ; Urinary Bladder Neoplasms ; Urology*

Follicular dendritic cell sarcoma is a rare neoplasm that originates from follicular dendritic cells in lymphoid follicles. This disease usually involves the lymph nodes, and especially the head and neck area. Rarely, extranodal sites may be affected, including tonsil, the oral cavity, liver, spleen and the gastrointestinal tract. We report here on the imaging findings of follicular dendritic cell sarcoma of the abdomen that involved the retroperitoneal lymph nodes and colon. It shows as a well-defined, enhancing homogenous mass with internal necrosis and regional lymphadenopathy.
Abdomen/ultrasonography ; Abdominal Neoplasms/complications/*radiography/*ultrasonography ; Abdominal Pain/etiology ; Aged ; Colon/radiography/ultrasonography ; Colonic Neoplasms/complications/*radiography/*ultrasonography ; Dendritic Cell Sarcoma, Follicular/complications/*radiography/*ultrasonography ; Dendritic Cells, Follicular/radiography/ultrasonography ; Diagnosis, Differential ; Dyspepsia/etiology ; Female ; Gastrointestinal Hemorrhage/etiology ; Humans ; Lymph Nodes ; Male ; Middle Aged ; Radiography, Abdominal/methods ; Retroperitoneal Space/radiography/ultrasonography ; Tomography, X-Ray Computed/methods