METASTATIC ADENOCARCINOMA IN A THYROID COLLOID NODULE - A RARE PRESENTATION OF COLON-CANCER

Colorectal cancer can remain asymptomatic for years. Frequently sympto ms develop insidiously and may often remain unnoticed for long periods , even in the presence of disseminated disease. We herein report an un usual case of a patient with carcinoma of the sigmoid colon and multip le liver metastases. The diagnosis was established only after the pati ent was operated on for a targe colloid nodule, a single microscopic m etastatic focus being noticed in the histologic sections. The differen tial diagnosis compared with the columnar type of papillary carcinoma is discussed.