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Frequency of thyroid carcinoma and thyroid autoimmunity in first-degree relatives of patients with papillary thyroid carcinoma: A single center experience

2011; Editora da Universidade de São Paulo; Volume: 55; Issue: 5 Linguagem: Inglês

10.1590/s0004-27302011000500005

1677-9487

Elaine Maria dos Santos Gomes, Fernanda Vaisman, Ana Paula Vidal, Rossana Corbo, Manuel Domingos Gonçalves da Cruz, Patrícia de Fátima dos Santos Teixeira, Alexandru Buescu, Mário Vaisman,

BRCA gene mutations in cancer

To evaluate the frequency of thyroid cancer and thyroid dysfunction in first-degree relatives of thyroid cancer patients, and to determine if there is a difference between familial and sporadic thyroid cancer.Fifteen first-degree relatives of seven families with at least two family members with thyroid cancer (TC) were compared with 128 first-degree relatives of 45 families with only one family member affected. Laboratory and ultrasound evaluation, fine-needle aspiration biopsy and thyroid surgery were used as normally done in clinical practice.Thyroid dysfunction was similar between the two groups. The frequency of TC and autoimmunity in the group that had two relatives with known thyroid cancer was higher, compared with the families that had sporadic thyroid cancer among their family members (40% vs. 2%, p = 0.0001).Frequency of TC increases when more than one member of the family is affected. These findings suggest that these relatives should be screened more frequently than individuals in families in which only one case of TC is observed.