A case report and literature review of rectal lipoma

RATIONALE: Colonic lipomas are uncommon benign submucosal adipose tumors that are usually asymptomatic. In principle, large lipomas can cause symptoms that require further treatment. Here, we report a case of prolapsed giant rectal lipoma and transanal mass resection. PATIENT CONCERNS: A 65-year-old male developed rectal mass prolapse with bloody stool for 1 day. DIAGNOSES: The pathological findings were rectal lipoma. INTERVENTION: After resection of the anal tumor, the patient postoperative symptoms quickly disappeared. OUTCOMES: No recurrence of the condition was observed after 6 months of follow-up after surgery. LESSONS: It is safe and feasible for us to perform transanal mass resection for giant rectal lipomas that protrude outside the anus.