A Case of Sigmoid Colon Cancer Postoperative Choroidal Metastasis

Abstract

The patient was a 65-year-old man. Three years previously, he consulted his local physician for a chief complaint of bloody stools. On lower gastrointestinal endoscopy, an easily bleeding elevated lesion with an irregular surface was found approximately 25 cm from the anal verge, and on biopsy, the results revealed group 5 and tub 2. Sigmoidectomy (D3) was performed. Pathohistological examination results revealed pT2 (MP), pN0, pStage Ⅰ, tub 2, ly0, and v0. After discharge from the hospital, he was regularly followed up on an outpatient basis. On imaging performed 6 months thereafter, a metastatic liver tumor was noted and right lobectomy was performed. Furthermore, on diagnostic imaging performed 1 year after the hepatectomy, a metastatic tumor was found in the caudate lobe, and caudate lobectomy was performed. He experienced reduced vision of the left eye and complained of blurred vision during regular examinations performed approximately 6 months after the second hepatectomy. Therefore, he was referred to the ophthalmology department of our hospital for further examination. The visual acuity of his left eye was found to have decreased from 1.0 to 0.05. On close examination, left choroidal metastasis of the sigmoid colon cancer was diagnosed as part of the clinical course.