Open AccessA Small Aneurysmal Bone Cyst Restricted to the Cortical Bone of the Femur Resembling So‐called Subperiosteal Giant Cell Tumor or Subperiosteal Osteoclasia
Author(s) -
Okada Kyoji,
Masuda Hirotake,
Shozawa Takeshi,
Arai Michio
Publication year - 1989
Publication title -
acta patholigica japonica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.73
H-Index - 74
ISSN - 0001-6632
DOI - 10.1111/j.1440-1827.1989.tb01521.x
Subject(s) - lesion , periosteum , anatomy , aneurysmal bone cyst , femur , diaphysis , cortical bone , medicine , cyst , pathology , fibrous dysplasia , surgery
We report a 16‐year‐old Japanese girl with a cystic lesion restricted to the cortical bone under the periosteum of the diaphysis of the left femur. Roentgenograms showed a long, oval translucent lesion in frontal view and an eccentric erosive lesion in lateral view. Computed tomography showed a distinct intracortical lesion. The lesion, which was excised en bloc , measured 3×2×2 cm. The outer layer of the cortical bone was eroded eccentrically. From the margin of the eroded bone, thin fragile bony tissue and preserved periosteum extended like the roof of a dome. Multicystic structures, filled with blood, were lined with fibrous granulation and occasional giant cells. Histologically, this lesion falls within the category of aneurysmal bone cyst. However this case is of a rare type, since the lesion was relatively small, and showed a very specific intracortical location, in marked contrast to typical aneurysmal bone cyst. Additionally, this lesion is similar to so‐called subperiosteal giant cell tumor or subperiosteal osteoclasia described in the literature. Acta Pathol. Jpn. 39: 539∼544, 1989.