title: Langerhans cell histiocytosis on the penis: a case report.
abstract: BACKGROUND
  Langerhans cell histiocytosis affects mainly young children and features an accumulation of CD1a+ dendritic Langerhans cells in the bone, skin, and other organs. A few cases of Langerhans cell histiocytosis on the penis have been reported in the literature. We present a case of Langerhans cell histiocytosis on the penis and review the similar cases in the literature.
  
  
  METHODS
  The patient was a 13-year-old boy who had a history of lymph node, femur bone, and pituitary-thalmic axis lesions from Langerhans cell histiocytosis who noticed a painful nodule on the prepuce of his penis. The histological and immunohistochemical examination fulfilled the criteria of Langerhans cell histiocytosis.
  
  
  CONCLUSIONS
  We herein describe the case reported of Langerhans cell histiocytosis on the penis.
authors.affiliation: Department of Urology, Saitama Medical University, Saitama, Japan. junhagi@hotmail.com
authors.forename: Jun
authors.initials: J
authors.lastname: Hagiuda
authors.forename: Munehisa
authors.initials: M
authors.lastname: Ueno
authors.forename: Satoshi
authors.initials: S
authors.lastname: Ashimine
authors.forename: Isao
authors.initials: I
authors.lastname: Kuroda
authors.forename: Keisuke
authors.initials: K
authors.lastname: Ishizawa
authors.forename: Nobuhiro
authors.initials: N
authors.lastname: Deguchi
mesh_terms: D000293:Adolescent; D006646:Histiocytosis, Langerhans-Cell / Q000473:pathology*; D006801:Humans; D008297:Male; D010409:Penile Diseases / Q000473:pathology*