Robot-Assisted Sigmoidectomy in a Patient With Situs Inversus Totalis: A Case Report.

Situs inversus totalis (SIT) is a rare congenital anomaly characterized by a complete mirror-image transposition of thoracic and abdominal organs. Surgery in such patients is technically challenging because of the reversed anatomy, and only a few cases of robot-assisted surgery (RS) for colon cancer in SIT have been reported. We report a rare case of robot-assisted sigmoidectomy with radical lymph node dissection for sigmoid colon cancer in a 31-year-old woman with SIT. The patient presented with abdominal pain and hematochezia, and was diagnosed with sigmoid colon cancer at a previous hospital. Further examination at our institution confirmed SIT, and a robot-assisted sigmoidectomy was successfully performed with modified port placement to accommodate the mirrored anatomy. The procedure was completed safely, and the patient was discharged without complications. RS can be a safe and effective approach for patients with anatomical anomalies such as SIT.