Abstract

Skeletal muscle biopsies present unique preparatory challenges to the histotechnologist and unique diagnostic challenges to the clinician and pathologist. A muscle biopsy sample does not proceed through conventional fixation, nor is it processed via routine surgical pathology paraffin methods. A muscle biopsy must be dealt with as fresh tissue whose subsequent processing is a low-temperature freezing method that is ideally accomplished in a timely manner after surgical excision for optimal staining results. A panel of histological (nonenzyme) and enzymatic staining methods should be used on every muscle biopsy for full and complete clinical diagnostic results. Electron microscopy and immunohistochemistry may add valuable information in some cases. Many of these special procedures are not undertaken in the standard histology laboratory and are sent to specialized referral laboratories for testing and interpretation.The aim of this review is to reveal and summarize the unique aspects of muscle biopsies to ensure that any laboratory faced with handling a muscle biopsy will be prepared to take the correct action for optimal processing results. We also introduce the reader to muscle pathology and discuss the clinical utility of muscle biopsy in diagnosis of patients with neuromuscular disorders. (The J Histotechnol 30:257, 2007)Submitted September 24, 2007; accepted with modifications October 8, 2007

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