Abstract

PTEN hamartoma tumor syndrome (PHTS) is a rare genetic cancer and tumor predisposition syndrome. Due to the wide spectrum of clinical manifestations and variable age at onset, the pathways leading to a PHTS diagnosis are difficult and highly variable. Many patients were found to have PHTS after a cancer diagnosis, missing the opportunity of prevention or enhanced cancer screening. This retrospective study evaluated a PHTS cohort followed in a high-risk surveillance clinic in a comprehensive cancer institution. A significant portion of the patients (60.9%, 14/23) had at least one cancer diagnosis (average age 34.6 years at diagnosis). A significant portion (78.3%, 18/23) were affected with clinically significant goiters (age 27.9 years), and many (60.9%, 14/23) had partial or total thyroidectomy (age 27.1 years). The average age at goiter diagnosis or thyroidectomy is younger than a cancer diagnosis. In 12 individuals who were affected with clinically significant goiter and cancer, all cancers were diagnosed after the thyroid disease (6.3 years). As clinically significant thyroid nodules in childhood or early young adulthood are common in PHTS, but uncommon for general population, these early onset thyroid nodules may alert the clinician to initiate PHTS-targeted evaluation and genetic testing.

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