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Soft tissue aneurysmal bone cyst: a rare case in a middle aged patient
Kevin S Baker1, Elaine S Gould1, Hiten B Patel1
1Department of Radiology, Stony Brook University Medical Center, Stony Brook, NY, USA.
Journal of Radiology Case Reports
|May 1, 2015
Summary
A rare soft tissue aneurysmal bone cyst (ABC) occurred in a 41-year-old female, presenting as a shoulder mass. This case highlights the importance of considering soft tissue ABC in adults, with successful surgical excision and no recurrence.
Area of Science:
- Orthopedics
- Radiology
- Pathology
Background:
- Soft tissue aneurysmal bone cyst (ABC) is exceptionally rare, particularly in adults over 40.
- Literature reports approximately 20 cases, with only 3 in patients older than 40.
Observation:
- A 41-year-old female presented with atraumatic chest pain, later developing a palpable left shoulder mass.
- Imaging revealed a large mass with rim calcification, hypodense areas, and thin septations.
- MRI demonstrated hemorrhagic cystic spaces with fluid-fluid levels and enhancing septations.
Findings:
- Initial biopsy interpretation was cystic myositis ossificans, revised to soft tissue ABC on final review.
- Surgical excision was performed.
- A 3-year post-operative radiograph showed no evidence of recurrence.
Implications:
- This case expands the understanding of soft tissue ABC presentation in adults.
- Accurate diagnosis requires careful pathological review, distinguishing it from other cystic lesions.
- Successful surgical management is demonstrated, with long-term follow-up confirming no recurrence.
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