[Cowden syndrome diagnosed in patients with macrocephaly].

Cowden syndrome is a rare autosomal dominant syndrome with a predisposition to cancer. We present a case of Cowden syndrome in a mother and her son, who were diagnosed with palmoplantar hyperkeratosis, macrocephaly and goitre. Early diagnosis is a challenge as the patients present with a variety of symptoms, but it is important because of the risk of cancer.