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https://www.selleckchem.com/products/CP-690550.html Although pubertal gynecomastia is a common clinical presentation of adolescent males, prepubertal gynecomastia is uncommon and mostly idiopathic. However, pathological causes of prepubescent gynecomastia are encountered in clinical practice. This manuscript carries an important message to general pediatricians, to care about exclusion of pathological causes for every patient of prepubertal gynecomastia. We present four different patients with pathological gynecomastia. One of them revealed to be secondary to Sertoli cell tumor, while the second patient describes trauma as a rare cause of prepubertal true gynecomastia. To the best of our knowledge, this is the first time to report occupational trauma as a cause of true gynecomastia as confirmed by pathological specimen, in a prepubertal boy. The third patient presented with retro-areolar mass and bloody nipple discharge secondary to mammary duct ectasia and had favorable self-limited course. Hyperprolactinemia secondary to neglected congenital hypothyroidism was the cause beyond gynecomastia in the fourth patient and this cause has been reported only once in the literature.Conclusion Despite being rare, pathological causes of prepubertal gynecomastia are encountered in clinical practice, and full investigations including breast and testicular ultrasound are needed to exclude any pathology before diagnosing idiopathic gynecomastia. Repeated friction of the breast can lead to true gynecomastia not only to pseudogynecomastia as previously known. What is Known • It has been reported that trauma can cause pseudogynecomastia due to hematoma or fat necrosis. • Prepubertal gynecomastia is mostly idiopathic. What is New • Long-term breast trauma can cause true gynecomastia (adenosis). • Although being mostly idiopathic, pathological causes of prepubertal gynecomastia must be ruled out. Elephant populations have greatly reduced mainly due to illegal poaching for their ivory.

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