Transanal Minimally Invasive Surgery for a Gastrointestinal Stromal Tumor of the Lower Rectum: A Case Report.

Rectal gastrointestinal stromal tumors (GISTs) are prevalent in the lower rectum, and the existing literature suggests that transanal interventions are advantageous for anorectal preservation. Herein, we present a case of rectal GIST resection using transanal minimally invasive surgery. A 75-year-old woman reported vaginal discomfort and was subsequently diagnosed with GIST via transanal tumor biopsy. Local excision using transanal minimally invasive surgery was performed with an operative duration of 203 min and minimal hemorrhage. No evidence of recurrence was observed at the one-year postoperative follow-up.