[Cowden's syndrome].

Multiple hamartoma and neoplasia syndrome, or Cowden's disease, is a genodermatosis inherited as an autosomal dominant trait with variable expressivity. We describe a woman with classic mucocutaneous features of the syndrome: facial papules, acral keratoses, oral mucosal papillomatosis, oral polyps and scrotal tongue. As a child she had strabismus. Her family history is positive for the disease, and a sister died of malignant melanoma. The check-up revealed chronic lymphocytic thyroiditis. A checklist for use in screening patients with Cowden's disease is proposed.