Familial occurrence of papillary thyroid carcinoma

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Abstract
We report two kindreds from northern Norway with 7 and 4 cases of papillary thyroid carcinoma in otherwise healthy, nonirradiated subjects. While histologic features were comparable the patient's age at the time of diagnosis was lower and lymph node metastases were more frequent in familial than in nonfamilial cases of papillary thyroid carcinoma from the same region. We conclude that genetic factors can predispose the patient for development of papillary thyroid carcinoma. The high local incidence may be due to interaction between susceptibility gene(s) and environmental factors.

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