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Published on: October 20, 2023
Primary aneurysmal bone cyst of patella
N Somasekhar Reddy1, Venkata Reddy Sathi
1Department of Orthopaedics Apollo Hospitals, Hyderabad, India.
Indian Journal of Orthopaedics
|October 20, 2009
Summary
A rare Stage III aneurysmal bone cyst (ABC) of the patella was treated with curettage, cautery, and bone grafting. Four years post-surgery, the graft was incorporated, with mild knee pain but normal function.
Area of Science:
- Orthopedic Surgery
- Musculoskeletal Oncology
- Bone Pathology
Background:
- Aneurysmal bone cysts (ABC) are rare, with patellar involvement accounting for less than 1% of all cases.
- Stage III ABC of the patella presents a unique surgical challenge due to its location and potential for recurrence.
Purpose of the Study:
- To report a case of Stage III aneurysmal bone cyst (ABC) of the patella.
- To describe the surgical management and long-term outcomes of this rare condition.
Main Methods:
- Surgical intervention involved curettage of the cyst, followed by chemical and thermal cautery of the bone bed.
- Autogenous bone grafting was performed to reconstruct the patellar defect.
- Follow-up included clinical assessment and imaging to monitor for recurrence and graft incorporation.
Main Results:
- At two-year follow-up, suspicion of lucency was noted, but repeat curettage revealed only fibrous tissue.
- At four-year follow-up, the autogenous bone graft was well incorporated.
- The patient experienced mild anterior knee pain during stair climbing but achieved normal knee function.
Conclusions:
- Surgical management including curettage, cautery, and autogenous bone grafting can be effective for Stage III patellar aneurysmal bone cysts.
- Long-term follow-up is crucial to monitor for potential recurrence and assess graft integration.
- Despite the rarity, successful treatment of patellar ABCs can restore knee function.
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