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sinus anales (medicine)


sinus anales -->
anal sinuses


The grooves between the anal columns.

Synonym: Morgagni's sinus.

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: sinus anales, anal crypts, Morgagni's crypts, rectal sinuses.