Abstract

Gynecomastia is the proliferation of the glandular breast tissue in men and often a benign course of breast growth. The main factor that led to the development of gynecomastia is deterioration of sex hormone balance due to increased production of estrogen or decreased levels of androgen. Therefore, physiological causes, endocrine dysfunctions, systemic diseases and medications should be considered that may affect the sex hormone levels in assessment of patients with gynecomastia. Despite gynecomastia has long been associated with thyrotoxicosis, the patients admitted with gynecomastia is quite rare and limited to case reports. This case report evaluating a 66-year-old male patient with bilateral gynecomastia and emphasized the need to be considered in the differential diagnosis of gynecomastia even thyrotoxicosis symptoms are not in the foreground. It is important to keep in mind to treat both the underlying pathology and gynecomastia.