pectenosis

noun
pec·​te·​no·​sis | \ˌpek-tə-ˈnō-səs \
plural pectenoses\-​ˈnō-​ˌsēz \ or pectenosises

Medical Definition of pectenosis 

: a condition that affects the middle third of the anal canal and is characterized by the formation of a thick hardened ring of fibrous tissue with resulting stenosis and contracture

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