sphincteroscopy

sphinc·ter·os·co·py

(sfingk'tĕr-os'kŏ-pē), Visual examination of a sphincter.

sphincteroscopy

S14-880140 (sfĭngk″tĕr-ŏs′kō-pē) Inspection of the internal anal sphincter. The internal anal sphincter is covered by anodermal and mucous membrane tissues that cannot be seen unless exposed surgically.