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J Pediatr Surg. 2013 Feb;48(2):e21-3. doi: 10.1016/j.jpedsurg.2012.11.051.

Prepubertal unilateral gynecomastia and the presence of 47,XXY mosaicism in breast epithelial cells: a case report.

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1
Department of Plastic Surgery, Breast Surgery and Burns Treatment, Copenhagen University Hospital, Rigshospitalet, Denmark. stemann@gmail.com

Abstract

Breast enlargement in prepubertal boys is a rare condition. This case report describes an otherwise healthy 3-year old non-obese boy who developed a large unilateral cystic breast mass measuring approximately 9 × 6 × 4 cm. The mass was initially treated as a lymphatic malformation, and sclerotherapy with Picibanil (OK-432) was attempted without any detectable effect on size. The mass was later excised. The pathological examination revealed mammary gland tissue suggestive of idiopathic gynecomastia. FISH revealed 47, XXY mosaicism in the abnormal breast epithelial cells, but not in peripheral blood lymphocytes.

PMID:
23414896
DOI:
10.1016/j.jpedsurg.2012.11.051
[Indexed for MEDLINE]
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