Abstract
In this case report, we describe a rare case of heterochronous colon metastasis from a fallopian tube carcinoma.
The patient was a woman in her 70's who presented to us with a history of having undergone simple total hysterectomy, bilateral salpingo-oophorectomy, omentectomy and sigmoidectomy for left fallopian tube cancer with possible direct invasion of the sigmoid colon. The cancer was diagnosed by histopathology as a serous adenocarcinoma, pT1c Nx(cN0) M0, stage I. Postoperative adjuvant chemotherapy was not employed. An abdominal CT performed 3 years after the operation showed nodular shadows suggestive of peritoneal dissemination in the pouch of Douglas and behind the ascending colon. Total colonoscopy revealed a type 1 intraluminal tumor of the ascending colon. Because the patient was suffering from severe anemia caused by bleeding from the tumor, we performed open ileocecal resection.
The histo-pathology report revealed serous adenocarcinoma with lymphatic invasion and lymph node metastasis, and the histological type was identical to that of the previously resected fallopian cancer. As there was no evidence of penetration of the surface of the visceral peritoneum by the tumor, it was considered that the metastasis had occurred via the lymphogenous route.
