[An autopsy case of alpha-fetoprotein-producing carcinoma of the sigmoid colon resulting in sudden death].

A 63-year-old woman was admitted to our hospital with complaints of abdominal distention and bilateral cervical masses. Her serum AFP was 11700 ng/dl. AFP was confirmed immunohistochemically by biopsy of a sigmoid colon tumor, yielding a diagnosis of AFP-producing carcinoma of the sigmoid colon, accompanied by multiple liver metastases, and systemic multiple lymph node metastases.