A

The AAE diagnostic glossary lists “Symptomatic apical periodontitis,” “Asymptomatic apical periodontitis,” “Acute apical abscess,” and “Chronic apical abscess,” but it does not include the term “Chronic apical periodontitis.” Therefore, option A is the only term not found in the AAE Glossary of Endodontic Terms [McClannahan et al., 2011, PMID 22132547; Gutmann et al., 2009, PMID 19932340].