title: Radiological reasoning: recurrent right lower quadrant inflammatory mass.
abstract: OBJECTIVE
  We discuss the case of a 58-year-old woman who presented with right lower quadrant pain and fever. CT showed a right lower quadrant inflammatory mass presumed to be an appendiceal abscess. The patient underwent open drainage of the mass but failed to return for an interval appendectomy. She returned 23 months later with a recurrent right lower quadrant inflammatory mass treated initially with percutaneous drainage followed by interval appendectomy. The final pathologic diagnosis was mucinous cystadenoma with perforation.
  
  
  CONCLUSIONS
  Primary neoplasms of the appendix are uncommon but should be considered in the correct clinical and imaging scenario.
authors.affiliation: Department of Radiology, University of Washington, Harborview Medical Center, 325 Ninth Ave., Box 359728, Seattle, WA 98104-2499, USA. mbittle@u.washington.edu
authors.forename: Michelle M
authors.initials: MM
authors.lastname: Bittle
authors.forename: Felix S
authors.initials: FS
authors.lastname: Chew
mesh_terms: D000038:Abscess / Q000000981:diagnostic imaging* / Q000601:surgery; D001063:Appendiceal Neoplasms / Q000150:complications / Q000000981:diagnostic imaging* / Q000601:surgery; D001064:Appendicitis / Q000000981:diagnostic imaging* / Q000209:etiology / Q000601:surgery; D018291:Cystadenoma, Mucinous / Q000150:complications / Q000000981:diagnostic imaging* / Q000601:surgery; D005260:Female; D006801:Humans; D008875:Middle Aged; D011859:Radiography; D012008:Recurrence