Rectal gastrointestinal stromal tumor

Case contributed by Mohammad Taghi Niknejad
Diagnosis almost certain


Pelvic pain and chronic constipation.

Patient Data

Age: 40 years
Gender: Male

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

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