Stroke & Vascular Disorders
Secondary stroke prevention
Dec. 28, 2023
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Toll Free (U.S. + Canada): 800-452-2400
US Number: +1-619-640-4660
Support: service@medlink.com
Editor: editor@medlink.com
ISSN: 2831-9125
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This muscle biopsy is from a 6-month-old boy with congenital muscle fiber-type disproportion. Formalin-fixed, paraffin-embedded, transverse section stained with hematoxylin-eosin shows normal fascicular architecture of the muscle, but 2 populations of fibers by size, hypoplastic and normal to hypertrophic fibers, neither of which exhibit central nuclei or other cytoarchitectural alterations; there is absence of myofiber necrosis, regeneration, or inflammation. Magnification x 100. (Contributed by Dr. Harvey Sarnat.)