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Progressive nerve territory overgrowth after subtotal resection of lipomatosis of the median nerve in the palm and wrist: a case, a review and a paradigm

  • Review Article - Neurosurgical Anatomy
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Abstract

Background

Lipomatosis of the nerve (LN) is a rare disorder characterized by the massive enlargement of peripheral nerves, frequently accompanied by generalized fibroadipose proliferation and skeletal overgrowth. The treatment of this disorder remains controversial, in part because of the rarity and the variability of presentation. Some authors have advocated total resection of this benign lesion including the functioning nerve, while others recommend symptomatic decompression alone.

Methods

We have been routinely following a 10-year-old boy for lipomatosis of the median nerve at the wrist noted shortly after birth. He underwent median nerve resection accompanied by sural nerve grafting at another institute. We review the literature on LN and the efficacy of nerve grafting.

Results

Clinically, he made a good recovery, with mild loss of thenar function and relatively preserved sensation. Serial magnetic resonance imaging over 5 years has revealed progression of the LN at both coaptation sites, fibrofatty proliferation within the nerve grafts as well as distal digital nerves, and enlargement of a fibrous scar at the coaptation sites. This has never been reported in the 9 decades of study of this disease.

Conclusion

We present the first medium-term follow-up of a patient who underwent nerve sacrifice to attempt to cure the LN alongside a historical review of treatment. We believe that macroscopic gross total resection (i.e., microscopic subtotal resection) is insufficient in stopping the potential progression of this hamartomatous lesion because of the persistent effect of trophic factors.

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Acknowledgment

The authors appreciate the assistance of David Factor, Rochester, MN.

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Authors and Affiliations

  1. Department of Neurologic Surgery, Mayo Clinic, Gonda 8-214, Rochester, MN, 55905, USA

    Mark A. Mahan, Kimberly K. Amrami & Robert J. Spinner

  2. Department of Radiology, Mayo Clinic, Gonda 8-214, Rochester, MN, 55905, USA

    Kimberly K. Amrami & Blake D. Niederhauser

  3. Department of Orthopedics, Mayo Clinic, Gonda 8-214, Rochester, MN, 55905, USA

    Robert J. Spinner

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  1. Mark A. Mahan
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Correspondence to Robert J. Spinner.

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Mahan, M.A., Amrami, K.K., Niederhauser, B.D. et al. Progressive nerve territory overgrowth after subtotal resection of lipomatosis of the median nerve in the palm and wrist: a case, a review and a paradigm. Acta Neurochir 155, 1131–1141 (2013). https://doi.org/10.1007/s00701-013-1707-z

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  • DOI: https://doi.org/10.1007/s00701-013-1707-z

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