[Familial cancer syndrome studies in 4 generations of a family].

An account is given of a family from the Canton of Valais suffering from hereditary adenocarcinomatosis. The pedigree extends over four generations; the first three comprised 47 individuals (28 males, 19 females), of whom 21 (16 males and 5 females), i.e. 44.6%, have malignant tumors. Of the 32 people in the fourth generation, only one individual is affected to date (a girl age 21, IV/4). There were 27 tumors in all: 16 adenocarcinomas of the colon, two gastric adenocarcinomas, one duodenal adenocarcinoma, one rectal adenocarcinoma, one papillary carcinoma of the ovary, one osseous sarcoma, one cutaneous fibrosarcoma, a multiform glioblastoma of the basal nuclei of the brain, a basocellular epithelioma, a cerebral metastasis from an adenocarcinoma, the origine of which has not been established, and a tumor invading the biliary tract. Three members of the family had multiple tumors. In three of the patient the colonic adenocarcinoma was accompanied by one or two polyps. The average age at onset for all tumors was 45 years. It was definitely lower in the third than the second generation (anticipation). The transmission was autosomal dominant, with predilection for the male sex (57.1% male and 26.3% female patients). The penetrance was about 80%. Finally, the diagnostic criteria for hereditary adenocarcinoma are discussed and the different familial forms of cancer are reviewed.