title: Anal duct/gland cyst: report of a case and review of the literature.
abstract: OBJECTIVE
  The purpose of this communication is to report a case of anal duct/gland cyst and review cases of perianal and presacrococcygeal mucus-secreting cysts reported in the literature with emphasis on their histopathologic features.
  
  
  METHODS
  Our patient presented with coccydynia. An extraluminal retrorectal tumor was felt on rectal examination. A computerized tomographic scan demonstrated a presacrococcygeal mass closely related to the anorectal junction. The tumor and the coccyx were excised using a posterior approach. Cases of perianal and presacrococcygeal mucus-secreting cysts reported in the literature were reviewed.
  
  
  RESULTS
  In our case, the tumor proved to be an anal duct/gland cyst. Some of the reported cases of presacrococcygeal glandular cysts had histopathologic features suggestive of anal duct/gland origin.
  
  
  CONCLUSIONS
  Diagnosis of anal duct/gland cyst is based on routine histologic features, histochemical characteristics of mucus, and/or the presence of a communication with an anal duct or crypt. Based on these criteria, some of the reported cases of mucus-secreting cysts occurring around the anorectum may prove to be anal duct/gland in origin.
authors.affiliation: State University of New York at Buffalo, School of Medicine and Biomedical Sciences, Department of Surgery, and Buffalo General Hospital, 14203, USA.
authors.forename: M N
authors.initials: MN
authors.lastname: Kulaylat
authors.forename: R J
authors.initials: RJ
authors.lastname: Doerr
authors.forename: M
authors.initials: M
authors.lastname: Neuwirth
authors.forename: S K
authors.initials: SK
authors.lastname: Satchidanand
mesh_terms: D000368:Aged; D001003:Anal Canal / Q000000981:diagnostic imaging / Q000473:pathology*; D001004:Anus Diseases / Q000175:diagnosis* / Q000000981:diagnostic imaging / Q000473:pathology; D003560:Cysts / Q000175:diagnosis* / Q000000981:diagnostic imaging / Q000473:pathology; D006801:Humans; D008297:Male; D014057:Tomography, X-Ray Computed