title: Myxoid plexiform fibrohistiocytic tumour.
abstract: Plexiform fibrohistiocytic tumour is a low-grade malignant mesenchymal neoplasm of myofibroblastic origin with the capacity for biphasic differentiation toward a fibroblastic or histiocyte-like morphology. We report a case of this rare tumour presenting as a tender subcutaneous nodule on the scalp of a 58-year-old man. Histopathological examination revealed multinodular biphasic proliferation of fibroblast-like and histiocyte-like cells with a few osteoclast-like giant cells. This case is notable for the rare myxoid changes, which may reflect a different behaviour of this tumour when occurring in older people.
authors.affiliation: Department of Dermatology, Asan Medical Center, College of Medicine, University of Ulsan, Songpa-gu, Seoul, Korea. vickycho@hanmail.net
authors.forename: S
authors.initials: S
authors.lastname: Cho
authors.forename: S E
authors.initials: SE
authors.lastname: Chang
authors.forename: J H
authors.initials: JH
authors.lastname: Choi
authors.forename: K J
authors.initials: KJ
authors.lastname: Sung
authors.forename: K C
authors.initials: KC
authors.lastname: Moon
authors.forename: J K
authors.initials: JK
authors.lastname: Koh
mesh_terms: D003937:Diagnosis, Differential; D005347:Fibroblasts / Q000473:pathology; D006644:Histiocytes / Q000473:pathology; D018219:Histiocytoma, Benign Fibrous / Q000473:pathology* / Q000601:surgery; D006801:Humans; D012535:Scalp; D012878:Skin Neoplasms / Q000473:pathology* / Q000601:surgery