title: Paediatric Erdheim-Chester disease with aggressive skin manifestations.
abstract: Erdheim-Chester disease (ECD), a type of systemic non-Langerhans cell histiocytosis, is uncommon and characterized by the accumulation of CD68+CD1a-foamy histiocytes. It is extremely rare in children. The skin lesions of paediatric ECD have not been systemically described before. We report a case of ECD in a 3·5-year-old Chinese boy. The patient presented with generalized skin and bone involvement of 3 years' duration. Marked generalized annular maculopapular lesions with central atrophy were seen. These differed from previously reported adult xanthoma-like papules or periorbital xanthelasma-like lesions. Computed tomography revealed diffuse pulmonary fibrosis and generalized skeletal involvement, including osteolysis and osteosclerosis. The presence of CD68+CD1a-histiocytes allowed the diagnosis of ECD. According to our review of the literature, this is the paediatric case of ECD with the youngest age of onset. The generalized skin involvement made our case unique in comparison with those previously reported.
authors.affiliation: Department of Dermatology, Tianjin Children's Hospital, Tianjin, China.
authors.forename: H-H
authors.initials: HH
authors.lastname: Su
authors.affiliation: Department of Stomatology, Tianjin Medical University General Hospital, Tianjin, China.
authors.forename: W
authors.initials: W
authors.lastname: Wu
authors.affiliation: Ackerman Academy of Dermatopathology, New York, NY, U.S.A.
authors.forename: Y
authors.initials: Y
authors.lastname: Guo
authors.affiliation: Department of Dermatology, No. 1 Hospital of China Medical University, Shenyang, China.
authors.forename: H-D
authors.initials: HD
authors.lastname: Chen
authors.affiliation: Department of Dermatology, Tianjin Medical University General Hospital, Tianjin, China.
authors.forename: S-J
authors.initials: SJ
authors.lastname: Shan
mesh_terms: D002675:Child, Preschool; D031249:Erdheim-Chester Disease / Q000473:pathology*; D006801:Humans; D008297:Male; D010014:Osteolysis / Q000473:pathology; D010026:Osteosclerosis / Q000473:pathology; D012871:Skin Diseases / Q000473:pathology*; D014057:Tomography, X-Ray Computed