title: Parosteal fasciitis of the clavicle.
abstract: A rare case of parosteal fasciitis arising from the periosteum of the left clavicle in a 27-year-old woman is reported. Magnetic resonance imaging demonstrated the lesion surrounding the periosteum of the clavicle. The lesion was iso-intense with muscle on T(1)-weighted images and hyperintense on T(2)-weighted images. At surgery, the lesion was discovered to be densely adherent with the periosteum, and excised along with the periosteum. Histopathological examination revealed the proliferation of myofibroblasts in a vague storiform or short fascicular pattern. A large amount of extravasated erythrocytes, and a few lymphocytes were present in the matrix. There were some foci of abundant myxoid materials. Immunohistochemical study showed the cells to be positive for vimentin, alpha-smooth muscle actin and HHF35, but negative for desmin. There was no local recurrence at a 6 months postoperative follow up.
authors: Department of Orthopaedic Surgery, Kobe University School of Medicine, Kobe, Japan. yamatetu@med.kobe-u.ac.jp
authors: T
authors: T
authors: Yamamoto
authors: T
authors: T
authors: Marui
authors: K
authors: K
authors: Mizuno
authors: C
authors: C
authors: Obayashi
authors: R
authors: R
authors: Minami
authors: M
authors: M
authors: Inaba
authors: Y
authors: Y
authors: Hayashi
mesh_terms: D000199:Actins / Q000032:analysis; D000328:Adult; D002968:Clavicle / Q000737:chemistry / Q000473:pathology*; D005208:Fasciitis / Q000378:metabolism / Q000473:pathology*; D005260:Female; D006801:Humans; D007150:Immunohistochemistry; D009130:Muscle, Smooth / Q000737:chemistry; D010522:Periostitis / Q000378:metabolism / Q000473:pathology*; D014746:Vimentin / Q000032:analysis
chemical_list: D000199:Actins; D014746:Vimentin