2024 Volume 57 Issue 9 Pages 467-474
A 51-year-old man with bloody stools was referred to our hospital for treatment of a mesorectal tumor. Abdominal contrast-enhanced CT showed a 65-mm lobulated tumor with a diffuse contrast effect in the mesorectum and slight continuity with the posterior wall of the rectum. Endoscopic ultrasound needle biopsy was performed, but no diagnosis was made. The lesion was suspected to be a tumor of the mesorectum or rectum, and was resected under robotic assistance. Histologically, the mass was composed of spindle-shaped cells growing without a specific arrangement (patternless pattern), which were immunohistochemically positive for STAT6 and CD34. The final diagnosis was solitary fibrous tumor (SFT). At 8-month follow-up, there was no tumor recurrence. We describe this case as an example of robot-assisted resection of a mesorectal SFT.
