Presentation
Workup for pelvic pain and chronic constipation.
Patient Data
Increased wall thickness due to tumoral infiltration is noted at superior part of the rectum and rectosigmoid junction, accompanied by perirectal fat stranding.
Several perirectal enlarged lymph nodes with a maximum SAD of12 mm are seen.
The mesorectal fascia seems to be involved on the right side.
Infiltrative enhancing mass is noted at the rectosigmoid junction and proximal of the rectum. Additionally, an 18 mm ingrowth into the mesorectal fat and mesorectal fascia involvement are seen at the right lateral aspect. The distance between the lower border of the lesion and the anorectal angle is about 65 mm.
There are several enlarged lymph nodes in the mesorectal space.
Case Discussion
Rectal mass; pathology proved adenocarcinoma with mesorectal fascia involvement and regional enlarged lymph nodes.
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.