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J Knee Surg 2015; 28(03): 229-238
DOI: 10.1055/s-0034-1378192
Original Article
Thieme Medical Publishers 333 Seventh Avenue, New York, NY 10001, USA.

Infrapatellar Fat Pad Osteochondroma: Three Cases and a Systematic Review

Nathan Evaniew
1   Department of Surgery, Center for Evidence-Based Orthopaedics, McMaster University, Hamilton, Ontario, Canada
,
Darius Bayegan
1   Department of Surgery, Center for Evidence-Based Orthopaedics, McMaster University, Hamilton, Ontario, Canada
,
Snezana Popovic
2   Department of Pathology and Molecular Medicine, McMaster University, Hamilton, Ontario, Canada
,
Naveen Parasu
3   Department of Radiology, Juravinski Hospital, McMaster University, Hamilton, Ontario, Canada
,
Michelle Ghert
4   Department of Surgery, Juravinski Hospital, McMaster University, Hamilton, Ontario, Canada
› Author Affiliations
Further Information

Publication History

12 August 2013

13 April 2014

Publication Date:
29 May 2014 (online)

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Abstract

Extraskeletal para-articular osteochondromas of the infrapatellar fat pad are unique soft-tissue tumors whose etiology and clinical history remain poorly understood. We report three cases and a systematic review of the literature. Three females, aged 47, 54, and 70 years, presented with pain and a parapatellar knee mass. All three underwent marginal excision with no complications and no recurrence. In the literature, 32 reports describing 42 cases were identified. Mean age at presentation was 51.1 years (range: 12–75). There were 25 females and 20 males. Seven patients (15.6%) had a history of antecedent trauma. Mean duration of presenting symptoms was 63.9 months (range: 2–300). All patients except for one underwent open excision. Mean follow-up was 14.9 months (range: 3–96). There were no reports of recurrence or malignant transformation. Para-articular extraskeletal osteochondromas of the infrapatellar fat pad have a benign clinical history regardless of whether they are managed by arthroscopic or open marginal excision.

Keywords

osteochondroma - chondroma - knee - fat pad - surgery
 

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