PMID: 16521475Mar 9, 2006Paper

Histopathological and immunohistochemical study of the enteric innervations among various types of aganglionoses including isolated and syndromic Hirschsprung disease

Neuropathology : Official Journal of the Japanese Society of Neuropathology
Hadzki MatsudaYoichi Nakazato

Abstract

We investigated enteric innervations in 15 isolated and five syndromic cases of Hirschsprung disease (HSCR) with immunohistochemistry for the S100 protein (S100), class III a-tubulin (TUJ1), peripherin, neuronal nitric oxide synthase (nNOS) and CD34. The number of neurites per smooth muscle unit of the circular muscle layer (CML) was counted in the longitudinal sections. TUJ1 was the best marker to detect whole neuritic networks of the enteric nervous system. There were differences in the innervation patterns between isolated rectosigmoid aganglionosis (RS) and long segment aganglionosis (LS) including total colonic aganglionosis and extensive aganglionosis. In the aganglionic bowel (AGB) of LS, no nerve fibers innervated smooth muscle units in the CML in the area from the small bowel to the terminal descending colon. In the rectosigmoid region of every type of isolated HSCR, we observed transmural nerve fibers forming meshworks in the CML with TUJ1 and S100 antibodies. In RS, the neurites running parallel with smooth muscle cells gradually decreased in number in the distal portion. However, in the rectosigmoid AGB in LS, those neurites were absent and most neurites perpendicularly crossed the CML. Hypertrophic nerve trunks (HN...Continue Reading

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