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Medical Term:

anal sinuses



  1. the grooves between the anal columns;
  2. pockets or crypts in the columnar zone of the anal canal between the anocutaneous line and the anorectal line; the sinuses give the mucosa a scalloped appearance.

Synonym(s): Morgagni sinus1

© Copyright 2016 Wolters Kluwer. All Rights Reserved. Review Date: Sep 19, 2016.