Cha, Wonjae Chemocauterization of the internal opening with trichloroacetic acid as first-line treatment for pyriform sinus fistula. [electronic resource] - Head & neck Mar 2013 - 431-5 p. digital Publication Type: Journal Article ISSN: 1097-0347 Standard No.: 10.1002/hed.22998 doi Subjects--Topical Terms: AdolescentAdultCautery--methodsChildChild, PreschoolEsophagoscopyFeasibility StudiesFemaleFistula--drug therapyHumansLaryngoscopyMaleMiddle AgedPyriform Sinus--pathologyRetrospective StudiesTomography, X-Ray ComputedTreatment OutcomeTrichloroacetic Acid--therapeutic useYoung Adult