Table 2.

Etiologies of gynecomastia³,¹¹

Idiopathic gynecomastia (no detectable abnormalitiy)	25%
Pubertal gynecomastia	25%
Secondary to medication	10–20%
Cirrhosis or malnutrition	8%
Primary hypogonadism	8%
Testicular tumors	3%
Secondary hypogonadism	2%
Hyperthyroidism	1.5%
Chronic renal disease	1%