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KMID : 0613320000060040163
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Journal of the Korean Bone and Joint Tumor Soceity
2000 Volume.6 No. 4 p.163 ~ p.167
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Aneurysmal Bone Cyst of the Rib Misdiagnosed as Soft Tissue Tumor
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Lee Ah-Won
Lee Yeon-Soo
Jo Keon-Hyun
Lee Jung-Dal
Kim Byung-Kee
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Abstract
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Aneurysmal bone cyst(ABC) is a benign lesion and generally occurs in the long bones and vertebral column. ABC of the rib is an uncommon entity. We reported a case of ABC originating in the left first rib. The patient was a 19-year-old woman and presented with palpable mass on the shoulder. Chest X ray and MRI showed a large expansile mass, with multiple cystic areas, arising from the left first rib and bulging out into retroclavicular and paravertebral soft tissue, so the lesion was initially misdiagnosed as a soft tissue malignant tumor destructing adjacent rib. On histological examination, the mass, which was surrounded by a peripheral band of mature trabecular bone, consisted of multiple anastomosing cavernous blood channels separated by fibrous septa that containing osteoid, myxochondroid material and osteoclast-type giant cells.
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KEYWORD
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Aneurysmal bone cyst, Rib
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