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Histopathological changes in skeletal muscle associated with chronic ischaemia.

Journal article
Authors Sara Roos
Katharina S Sunnerhagen
Ali-Reza Moslemi
Anders Oldfors
Published in APMIS : acta pathologica, microbiologica, et immunologica Scandinavica
Volume 124
Issue 11
Pages 935-941
ISSN 1600-0463
Publication year 2016
Published at Institute of Neuroscience and Physiology, Department of Clinical Neuroscience and Rehabilitation
Institute of Biomedicine, Department of Pathology
Pages 935-941
Language en
Links dx.doi.org/10.1111/apm.12586
www.ncbi.nlm.nih.gov/entrez/query.f...
Subject categories Pathology, Orthopedics

Abstract

Muscle biopsy is an essential part in the diagnostic workup in patients with suspected neuromuscular disorders. It is therefore important to be aware of morphological alterations that can be caused by systemic factors or natural ageing. Chronic limb ischaemia is frequent in elderly individuals. This study was performed to examine histopathological and mitochondrial changes in muscle in patients with chronic critical limb ischaemia. Muscle biopsy of skeletal muscle of the lower limb of patients with chronic ischaemia leading to amputation was performed and compared with muscle biopsies of healthy, age-matched controls. The histopathological abnormalities included fibrosis, necrosis, atrophy, glycogen depletion, internal nuclei, rimmed vacuoles, fibre type grouping, cytochrome c oxidase deficient fibres, MHC-I upregulation, and signs of microangiopathy. The only alteration found in age-matched controls was a few cytochrome c oxidase deficient fibres. There were also increased levels of multiple mitochondrial DNA deletions in ischaemic muscles compared with controls. Critical limb ischaemia is associated with significant histopathological changes in muscle tissue and also increased levels of mitochondrial DNA deletions. Since the alterations mimic different primary myopathic changes, chronic ischaemia is important to consider as a differential diagnosis in elderly individuals, investigated with muscle biopsy for muscle disease.

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