Abstract
Incomplete obliteration of the processus vaginalis (PV) in children with inguinal hernia or hydrocele has recently been proposed to relate to smooth muscle cell (SMC) persistence. The aim of this study was to evaluate the diversity and differentiation of smooth muscle phenotypes in sacs associated with inguinal hernia and hydrocele through the expression of alpha-smooth muscle actin (SMA), h-caldesmon, desmin, and vimentin. Sacs associated with male hernia (n = 22), female hernia (n = 8), and hydrocele (n = 10) were immunohistochemically evaluated using monoclonal antibodies against SMA, h-caldesmon, desmin, and vimentin. Peritoneal samples (male, 4; female, 3) and obliterated PV (male, 3) obtained from age-matched patients served as controls. Expressions according to the groups were compared through chi-squared test, and P values less than 0.05 were considered to be statistically significant. Immunohistochemistry did not shown the presence of SMCs in control samples. The expression of SMA, desmin, and h-caldesmon did not differ among sacs obtained from patients with inguinal hernia and hydrocele. However, strong expression of vimentin in SMCs within sacs obtained from patients with hydrocele in comparison with sacs from male p...Continue Reading
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