OBJECTIVE To describe the clinical course of 3 prepubertal boys who presented with gynecomastia resulting from indirect exposure to a custom-compounded preparation of estrogen cream used by each child's mother. METHODOLOGY Each child was initially referred to the Children's Medical Center of Dallas' Endocrinology Center and followed for over 1 year. RESULTS All 3 boys presented with gynecom...

An imbalance between estrogen action relative to androgen action at the breast tissue level results in gynecomastia. Enhancement of aromatization of androgens to estrogens is important in the pathogenesis of gynecomastia associated with obesity, aging, puberty, liver disease, thyrotoxicosis, 17-oxosteroid reductase deficiency. Klinefelter's syndrome, and neoplasms of the testes, adrenals and li...

BACKGROUND Imatinib mesylate has been the standard therapeutic treatment for chronic myeloid leukemia, advanced and metastatic gastrointestinal stromal tumor (GIST). It is well tolerated with mild adverse effects. Gynecomastia development during the course of treatment has been rarely reported. METHODS Ninety-eight patients with advanced or recurrent GIST were treated with imatinib mesylate. ...

H1-antihistamine is generally a well-tolerated and safe drug. However, in resemblance with all other drugs, H1-antihistamines can also prompt adverse drug reactions (ADRs). We recently encountered the very unusual ADR of H1-antihistamine-induced gynecomastia. A 21-year-old man with idiopathic anaphylaxis was treated with ebastine (Ebastel), a second-generation H1-antihistamine, for the preventi...

Ductal carcinoma in situ (DCIS) of the male breast is rare. Even more rare is the finding of DCIS in association with gynecomastia. After an extensive literature search, only two cases have been reported in the literature, both in adults. Here we present the case of a 16-year-old adolescent boy who presented with pubertal gynecomastia that was treated with bilateral subcutaneous mastectomies. A...

Prepubertal unilateral gynecomastia is an extremely rare condition. At present, its etiology and management strategy are not well known. Two unrelated prepubertal boys of ages 8 and 9 who presented with complaints of unilateral enlargement of breast tissue are reported. Physical examination, biochemical, hormonal and oncologic work-up findings were normal. Both patients were treated with periph...

Gynecomastia is the breast enlargement in males, due to increased glandular proliferation. This is very common condition and mostly physiological in neonates, pubertal boys and elderly persons. Some cases are pathologic and secondary to drugs, chronic liver and kidney disease or hyperthyroidism. Majority are asymptomatic and do not need treatment. If treatment is needed, it should be tailored a...