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CASE REPORT
Year : 2007  |  Volume : 41  |  Issue : 3  |  Page : 246-249

Multiple soft tissue aneurysmal cysts: An occurrence after resection of primary aneurysmal bone cyst of fibula


Institute of Pathology, Madras Medical College, Chennai - 600 003, Tamil Nadu, India

Correspondence Address:
P Karkuzhali
No.12/3, Main Road, Karpaga Vinayagar Colony, Alappakkam, Chennai, Tamil Nadu-600 116
India
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/0019-5413.33693

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We report a case of multiple extraosseous aneurysmal cysts occurring in the muscle and subcutaneous plane of postero-lateral aspects of the upper right leg. They appeared about 15 months after resection of aneurysmal bone cyst of the upper end of the fibula. They varied in size from 2 cm to 5 cm. Radiologically they were well-defined lesions with central septate areas surrounded by a rim of calcification. Histologically they showed central cystic spaces separated by septa consisting of fibroblasts, osteoclast type of giant cells and reactive woven bone. Thus they showed histological similarity with aneurysmal bone cysts, but did not show any connection with the bone. Only very few examples of aneurysmal cysts of soft tissue had been described in the past one decade and they were reported in various locations including rare sites such as arterial wall and larynx. Recent cytogenetic analyses have shown abnormalities involving 17p11-13 and/or 16q22 in both osseous and extraosseous aneurysmal cysts indicating its probable neoplastic nature. Our case had unique features like multiplicity and occurrence after resection of primary aneurysmal bone cyst of the underlying bone.


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