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Title: Morphometric analyses of normal pediatric brachial biceps and quadriceps muscle tissue
Authors: Sallum, Adriana M. E.
Varsani, Hemlata
Holton, Janice L.
Marie, Suely Kazue Nagahashi [UNIFESP]
Wedderburn, Lucy R.
Universidade Federal de São Paulo (UNIFESP)
Universidade de São Paulo (USP)
Great Ormond St Hosp Sick Children
Keywords: Skeletal muscle biopsy
Normal morphometry
Issue Date: 1-Apr-2013
Publisher: F Hernandez
Citation: Histology And Histopathology. Murcia: F Hernandez, v. 28, n. 4, p. 525-530, 2013.
Abstract: Pediatric normal brachial biceps (14 specimens) and quadriceps muscles (14 specimens) were studied by immunohistochemistry to quantify fiber-type, diameter and distribution, capillary density, presence of inflammatory cells (CD3, CD20, CD68) and expression of neonatal myosin and MHC class 1 proteins. Brachial biceps showed more fast-twitch fibers and lower capillary/fiber ratio than quadriceps. The mean diameter of both fiber types was smaller in biceps than quadriceps. Fast-fibers were smaller than slow-fibers, and capillary/fiber ratio was <1.0 in both muscles. Fiber size and capillary / fiber ratio increased with age. Normal limits for infiltrating haematopoietic cells were <4 T lymphocytes, or CD68+ cells, very few B cells, <6 neonatal myosin positive fibers, and no fibers MHC class 1 positive in one x20 field, for both muscles. The present comparison of quantitative findings between brachial biceps and quadriceps may allow standardization of the assessment of pathological changes in both pediatric muscles.
ISSN: 0213-3911
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Appears in Collections:Artigo

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