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- W2495200937 abstract "ObjectiveTo observe the changes in ultrastructure of the colon myenteric plexus in patients with slow transit constipation (STC).MethodsFourteen patients (1 man and 13 women, aged 26 ~ 68 years, mean age; 44 years) with severe, long¬standing idiopathic STC demonstrated by radiopaque marked gastroenterological transit studies underwent a partial or total colectomy. Sigmoid colon specimens from 14 patients with STC and 11 patients with non-obstructed rectal carcinoma as controls were studied by electron microscopy.ResultsIn the colon myenteric plexus of controls, neurons and neuroglia that form the neuropile were in a ratio of 2:1 - 3:1. Ganglions were enveloped not by thick connective tissue but by a thin basal lamina. Occasionally, Slender projections of fibroblasts could be seen. Abundant rough endoplasmic reticulum, ribosome and smooth endoplasmic reticulum could be seen in the neuroplasm. Golgi bodies were well developed. The nucleus mainly contained euchromatin. It was lightly stained and a nucleolus could be seen distinctly. Cross-sections, both horizontal and vertical, of axons and dendrites could be seen in the neuropile. There were abundant neurotubules and neurofilaments in the axon. The end bulb contained various forms of synaptic vesicles. The myenteric plexus of STC patients all showed distinct pathologic changes, which could be categorized as: (1) distinct degenerative changes in the neurons and their projections, axons and dendrites were vacuolated with lattice formation, the neuroglia had various sized vacuoles and lipofuscin deposits; (2) reduction in the number of small vesicles in both the axon end bulb and presynaptic zone, vacuolization in most synaptic vesicles.ConclusionsSTC patients have distinct ultrastructural changes in their colon myenteric plexus. These morphological changes might be related to the disturbed colon motility and laxative abuse." @default.
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- W2495200937 date "1999-11-01" @default.
- W2495200937 modified "2023-09-23" @default.
- W2495200937 title "CHANGES IN ULTRASTRUCTURE OF THE COLON MYENTERIC PLEXUS AND ITS SIGNIFICANCE IN SLOW TRANSIT CONSTIPATION" @default.
- W2495200937 doi "https://doi.org/10.3760/cma.j.issn.0366-6999.1999.11.129" @default.
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