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Case Reports in Medicine
Volume 2014, Article ID 794648, 5 pages
http://dx.doi.org/10.1155/2014/794648
Case Report

Malignant Granular Cell Tumor of the Back: A Case Report and Review of the Literature

1Division of Surgical Oncology, University of Miami Miller School of Medicine, Jackson Memorial Hospital/Sylvester Comprehensive Cancer Center, 1120 NW 14th Street, CRB C232, Miami, FL 33136, USA
2Sylvester Comprehensive Cancer Center, University of Miami Miller School of Medicine, Miami, FL 33136, USA
3Department of Pathology, University of Miami Miller School of Medicine, Miami, FL 33136, USA

Received 13 July 2014; Accepted 5 November 2014; Published 24 November 2014

Academic Editor: Thomas R. Chauncey

Copyright © 2014 Laura Stone McGuire et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Malignant granular cell tumors are rare, intensely aggressive entities. This paper presents a case of a large rapidly recurrent malignant granular cell tumor with regional and distal metastases on the back of a 54-year-old Cuban man. The primary tumor recurred within six months of the original wide local excision and with satellite lesions apparent at twelve months, and the mass was diagnosed using the histological criteria established by Fanburg-Smith et al. for malignant granular cell tumors. By fifteen months, right axillary lymphadenopathy, multiple satellite lesions, pulmonary nodules, and distant metastasis in the right thigh were present. At sixteen months, wide local excision of recurrent mass and local satellite masses along with right axillary dissection and placement of Integra with subsequent split-thickness skin graft were performed by surgical oncology and plastic surgery teams. The surgical specimen measured 32.0 × 13.5 × 5.5 cm, containing multiple homogeneous masses with the largest mass 22.0 × 9.0 × 4.6 cm. Following surgery, patient was started on Pazopanib 800 mg/day based on phase III randomized trial data in the treatment of soft tissue sarcomas showing this as a potential novel therapy for malignant granular cell tumors.