Presentation
Abdominal pain and progressive distension.
Patient Data
Marked asymmetrical increase wall thickness due to tumoral infiltration is present at rectosigmoid junction measuring about 8cm in length. A few lymphadenopathies with SAD less than 15 mm are noted in the vicinity of diseased segment.
Massive abdominopelvic ascites is present accompanied by multiple omental soft tissue density masses and causing liver margin scalloping.
There are also several small hypodense lesions at liver which shows no obvious enhancement on post contrast images most consistent with cysts.
Several non-enhanced simple cortical cysts are seen at both kidneys.
The prostate gland is enlarged.
Case Discussion
Rectosigmoid colon mass; pathology proven adenocarcinoma with regional lymphadenopathies, ascites and diffuse peritoneal tumoral deposits.
Colorectal cancers can be found anywhere from the cecum to the rectum. Rectosigmoid involvement includes about 55% of cases as the most common site of colorectal cancer. CT is the modality most used for staging colorectal carcinoma, however, MRI is the preferred modality for the staging of rectal cancer.