Abstract
Cowden syndrome (CS) is the prototypic PTEN hamartoma tumor syndromes (PHTS), rare clinical syndromes characterized by germline mutations of the tumor suppressor PTEN. CS is characterized by association of macrocephaly, facial trichilemmomas, acral keratoses, papillomatous papules, with increased risk for breast, thyroid and endometrial cancer. PTEN, which is located on chromosome 10q23, regulates negatively the prosurvival PI3K/Akt/mTOR pathway through a lipid phosphatase activity. Loss of PTEN activates this pathway and leads to increased cellular growth, migration, proliferation, and survival. CS diagnosis is clinical, based on the association of pathognomonic, major and minor criteria. The association in a patient with thyroid cancer, rarely with multinodular goiter, of typical dermatological manifestations, easily identifiable by clinical examination (papillomatous papules, acral keratoses, trichilemmomas), with a history of breast, endometrial, or renal cancer, or hamartomatous tumors presence, should alert the clinician. Clinical management of patients with CS is multidisciplinary, to include early and frequent screening, surveillance, and preventive care for associated malignancies. The development of antineoplastic age...Continue Reading
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