Hirschsprung's disease(redirected from Aganglionic megacolon)
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Hirschsprung's disease[′hərsh‚pru̇ŋz di‚zēz]
A disease caused by absence of the myenteric ganglion cells in a segment of rectum or distal colon, resulting in spasm of the affected part and dilation of the bowel proximal to the defect.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.