title: A nodule on a boy's back.
authors: University of Siena, Siena, Italy.
authors: Giovambattista
authors: G
authors: De Aloe
authors: Sara
authors: S
authors: Poggiali
authors: Pietro
authors: P
authors: Rubegni
authors: Clelia
authors: C
authors: Miracco
authors: Michele
authors: M
authors: Fimiani
mesh_terms: D001415:Back; D002648:Child; D006801:Humans; D017728:Lymphoma, Large-Cell, Anaplastic / Q000473:pathology*; D008297:Male; D012878:Skin Neoplasms / Q000473:pathology*