Abstract
A 77-year-old man presented to a local hospital due to dyschezia and bleeding on defecation. Colonofiberscopy revealed a tumor encircling the circumference of the upper rectum (RSa), and gastrointestinal endoscopy detected a protruded tumor in the middle esophagus. Therefore, the patient was referred to our hospital with a diagnosis of double cancer of the rectum and esophagus. The rectal cancer was diagnosed as cT3N0M0, cStage II, and the esophageal cancer, as cT2N0M0, cStage II according to the Japanese Classification. Chest computed tomography showed the right aortic arch with an aberrant left subclavian artery classified as type IIIB aortic arch anomaly based on the Edwards' classification. The patient underwent low anterior resection for the rectal cancer, and chemoradiotherapy for the esophageal cancer. We selected mFOLFOX6 as both chemotherapy for esophageal cancer and adjuvant chemotherapy for rectal cancer. The patient is now alive without recurrence of the diseases over 1 year and 4 months after the operation. In conclusion, we experienced a rare case of successful treatment of rectal and esophageal cancer associated with the right aortic arch, a rare anatomical anomaly. Multimodal therapies including surgery and chemoradiosurgery might be a potent treatment for this patient.
