title: Transvaginal sonographic appearance of peritoneal pseudocysts.
abstract: OBJECTIVE
  To describe the sonographic features of peritoneal pseudocysts (PPCs) in order to determine the particular aspects that distinguish them from true ovarian cysts.
  
  
  METHODS
  Thirty-one women with PPCs were investigated using transvaginal sonography immediately before surgery. The diameters of the cysts were measured, and the shape, margins, content, location, presence of septa and echogenic portions were analyzed.
  
  
  RESULTS
  The PPCs were monolateral in 20 (65%) and bilateral in 11 (35%) women. A well-defined cystic structure was found in only six (19%) women, while in the other 25 (81%) women the PPCs showed blurred, undefined margins and a bizarre morphology, giving them a star-like tubular or lumpy shape. The ipsilateral ovary was identified in 26 (84%) cases either external to the cyst or entrapped within it like a 'spider in a web'. Septa were present in 25 (81%) cases and were often mobile, resembling a 'flapping sail' when touched by the endovaginal probe.
  
  
  CONCLUSIONS
  Despite having a gross morphology resembling that of a true ovarian cyst, PPCs present some characteristic sonographic findings that allow a correct differential diagnosis in the vast majority of cases.
authors.affiliation: Department of Obstetrics and Gynecology, University of Bologna, Bologna, Italy. lucasavelli@rocketmail.com
authors.forename: L
authors.initials: L
authors.lastname: Savelli
authors.forename: P
authors.initials: P
authors.lastname: de Iaco
authors.forename: T
authors.initials: T
authors.lastname: Ghi
authors.forename: L
authors.initials: L
authors.lastname: Bovicelli
authors.forename: F
authors.initials: F
authors.lastname: Rosati
authors.forename: B
authors.initials: B
authors.lastname: Cacciatore
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D003560:Cysts / Q000000981:diagnostic imaging* / Q000473:pathology; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D008875:Middle Aged; D010048:Ovarian Cysts / Q000000981:diagnostic imaging; D010532:Peritoneal Diseases / Q000000981:diagnostic imaging* / Q000473:pathology; D012189:Retrospective Studies; D014463:Ultrasonography