[A Case Report of Transverse Colon Cancer with Large Abdominal Wall Abscess].

A 65-year-old woman presented to the emergency outpatient department with a chief complaint of left hypochondriac pain and a rapidly expanding tumor mass. Abdominal contrast-enhanced computed tomography(CT)revealed a tumor in the transverse colon and an extensive abdominal wall abscess. A colonoscopy further confirmed a tumor in the transverse colon, and the patient was diagnosed with transverse colon cancer, abdominal wall infiltration, and abdominal wall abscess. Abscess drainage was performed, and abscess cavity shrinkage was noted. Infection control progressed favorably. A transverse colectomy was performed, and the abdominal wall of the infiltration site was only partially excised. Postoperative chemotherapy was performed, and the progress was carefully followed up. Increased tumor markers were noted 12 months postoperatively, and abdominal CT revealed a 20-mm tumor in the abdominal wall. With a diagnosis of local recurrence, the abdominal wall tumor was excised. The tumor markers normalized postoperatively and chemotherapy was completed. The patient has survived without relapses for 30 months since excision.