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Intramuscular Granular Cell Tumor in the Lower Extremities

  • Clinical Research
  • Published:
Clinical Orthopaedics and Related Research®

Abstract

Granular cell tumors are uncommon but typically histologically benign neoplasms that occasionally behave as malignant tumors. Differentiation of benign granular cell tumors from malignant counterparts with radiographic and/or histologic analysis is crucial for physicians. We retrospectively studied five cases of intramuscular granular cell tumors arising in the lower extremities. All tumors had been histologically diagnosed as benign and were resected with a wide surgical margin. The minimum followup was 1 year (mean, 45 months; range, 12–119 months) after surgery. Four patients had no local recurrence or distant metastasis (at a minimum of 18 months followup), whereas one patient with lymph node metastasis had a recurrence and distant metastasis 3 months after surgery resulting in death. Intramuscular granular cell tumors can be diagnosed based on their characteristic MRI features, such as peripheral high intensity on T2-weighed images, and histologic evaluation. The histologic criteria described by Fanburg-Smith et al. can differentiate malignant granular cell tumors from benign tumors. A wide resection seems suitable for most granular cell tumors in the extremities.

Level of Evidence: Level IV, diagnostic study. See the Guidelines for Authors for a complete description of evidence.

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Acknowledgments

We thank Dr. Satoko Shimada for helpful pathologic evaluation and Eri Ishihara for valuable secretarial assistance.

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Correspondence to Yoshihiro Nishida MD, PhD.

Additional information

One of the authors (YN) has received funding from the Ministry of Education, Culture, Sports, Science and Technology of Japan (Grant-in-Aid 20591751 for Scientific Research [C]).

Each author certifies that his institution has approved the human protocol for this investigation, that all investigations were conducted in conformity with ethical principles of research, and that informed consent was obtained.

This work was performed at Nagoya University Graduate School and School of Medicine and Aichi Cancer Center Central Hospital.

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Arai, E., Nishida, Y., Tsukushi, S. et al. Intramuscular Granular Cell Tumor in the Lower Extremities. Clin Orthop Relat Res 468, 1384–1389 (2010). https://doi.org/10.1007/s11999-009-1085-2

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  • DOI: https://doi.org/10.1007/s11999-009-1085-2

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