CC BY 4.0 · Surg J 2019; 05(02): e62-e64
DOI: 10.1055/s-0039-1692996
Case Report
Thieme Medical Publishers 333 Seventh Avenue, New York, NY 10001, USA.

Schwannoma: A Rare Hoffa's Fat Pad Tumor

1  Department of Orthopedic Surgery and Trauma, Complejo Hospitalario Universitario Insular Materno Infantil de Gran Canaria, Spain
,
Sara Estévez Sarmiento
1  Department of Orthopedic Surgery and Trauma, Complejo Hospitalario Universitario Insular Materno Infantil de Gran Canaria, Spain
› Author Affiliations
Further Information

Publication History

28 November 2018

21 May 2019

Publication Date:
29 July 2019 (online)

  

Abstract

Hoffa's fat pad can be affected by a variety of tumors. Schwannomas are benign and typically solitary neoplasms of the peripheral nerve sheath; they are made up of the neoplastic Schwann cells and are usually located eccentrically. Malignant schwannomas are extremely uncommon. Here we report a case of an intra-articular schwannoma of the knee. A 54-year-old man presented with a painful lump in the medial aspect of the knee. Magnetic resonance imaging revealed a well-circumscribed intra-articular mass, which was later diagnosed as an intra-articular schwannoma based on biopsy findings.