Parosteal fasciitis of the clavicle.
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.
Yamamoto
T
T
Department of Orthopaedic Surgery, Kobe University School of Medicine, Kobe, Japan. yamatetu@med.kobe-u.ac.jp
Marui
T
T
Mizuno
K
K
Obayashi
C
C
Minami
R
R
Inaba
M
M
Hayashi
Y
Y
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
D000199:Actins; D014746:Vimentin