Presentation
Pelvic pain and chronic constipation.
Patient Data
Age: 40 years
Gender: Male
From the case:
Rectal gastrointestinal stromal tumor
{"current_user":null,"step_through_annotations":true,"access":{"can_edit":false,"can_download":true,"can_toggle_annotations":true,"can_feature":false,"can_pin":false},"extraPropsURL":"/studies/100822/annotated_viewer_json?iframe=true\u0026lang=us"}
An 82×81×62mm enhancing, well defined mass is seen in the right wall of the lower and middle third of rectum. The mass originates from the rectal wall and shows exophytic growth. Mucosal layer over the mass is intact. The prostate is displaced anteriorly. There is no sign of vascular invasion.
Case Discussion
Large rectal wall mass; path proven gastrointestinal stromal tumor (GIST), which is the most common mesenchymal tumor of the gastrointestinal tract.
GISTs can occur anywhere along the gastrointestinal tract. Anorectal GISTs includes about 7% 1 of all cases and more likely to be high grade 2.