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家族性腺癌性息肉病（familialadenomatotouspolyposis）是一种按常染色体显性遗传的结直肠肿瘤。患者自十二、三岁时直肠乙状结肠内出现息肉状腺癌，随年龄增大，整个结肠内可充满成百上千个腺瘤样息肉。该病具有家族性和恶变倾向，如不予治疗，几乎所有病例迟早会发生结肠癌
Familial adenocarcinoma polyposis is an autosomal dominant colorectal tumor. The patient develops polypoid adenocarcinoma in the rectosigmoid colon at the age of twelve or three years. With age, the entire colon can be filled with hundreds of adenomatous polyps. The disease is familial and malignant. If left untreated, colon cancer will occur sooner or later in almost all cases.