PTEN hamartoma tumor syndrome (PHTS) is an uncommon group of genetic diseases. It is characterized by the presence of hamartomas (benign tumors caused by anomalous tissue growth), overgrowth and increased risk of malignant neoplasms, particularly of the breast, thyroid, endometrium, kidney, and colon. Other manifestations include macrocephaly, intellectual disability, mucocutaneous lesions, intestinal polyps, benign thyroid alterations, and vascular malformations.
The spectrum of PHTS encompasses Cowden syndrome, Bannayan-Riley-Ruvalcaba syndrome, and PTEN-related Proteus-like syndromes, all of which show a wide clinical variability and significant predisposition to tumors.
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