Periosteal osteoblastoma of the distal femur.
Osteoblastomas located on the surface of the cortical bone, so-called periosteal osteoblastomas, are extremely rare. We report on a case of periosteal osteoblastoma arising from the posterior surface of the right distal femur in a 17-year-old man. Roentgenographic, computed tomographic, magnetic resonance imaging, and histologic features of the case are presented. Periosteal osteoblastoma should be radiologically and histologically differentiated from myositis ossificans, avulsive cortical irregularity syndrome, osteoid osteoma, parosteal osteosarcoma, periosteal osteosarcoma, and high-grade surface osteosarcoma. Although periosteal osteoblastoma is rare, this tumor should be included in the differential diagnosis of surface-type bone tumors.
Nakatani
Tetsuya
T
Department of Orthopaedic Surgery, Kobe University Graduate School of Medicine, 7-5-1 Kusunoki-cho, Chuo-ku, Kobe, Japan.
Yamamoto
Tetsuji
T
Akisue
Toshihiro
T
Marui
Takashi
T
Hitora
Toshiaki
T
Kawamoto
Teruya
T
Nagira
Keiko
K
Fujita
Ikuo
I
Matsumoto
Keiji
K
Yoshiya
Shinichi
S
Kurosaka
Masahiro
M
D000293:Adolescent; D001859:Bone Neoplasms / Q000175:diagnosis*; D005269:Femur / Q000000981:diagnostic imaging / Q000473:pathology*; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D018215:Osteoblastoma / Q000175:diagnosis*; D010521:Periosteum / Q000473:pathology; D014057:Tomography, X-Ray Computed