title: [Ectopic pancreatic tissue within a mediastinal cyst--a rare clinical manifestation].
abstract: BACKGROUND
  We describe the case of a patient aged 25 years showing the rare finding of a mediastinal tumour containing ectopic pancreatic -tissue (maximum diameter of 15 cm). At admission, the patient presented with symptoms comparable to those of pneumonia. A computed tomographic scan of the thorax confirmed an -extensive mediastinal mass. A transthoracic puncture aspiration followed by a cytological examination failed to provide information of diagnostical relevance. OPERATION: To resect the mass and its adjacent tissue completely, a posterolateral thoracotomy on the left side was performed. The histopathological examination revealed exo- and endocrinic pancreatic tissue and a pancreatic pseudocyst with-out a thoracopancreatic fistula.
  
  
  CONCLUSIONS
  The incidence of mediastinal cysts containing pancreatic tissue seems to be extremely low. Above all, our case is the only one presenting clinical symptoms of a lobar pneumonia. In consideration of the current literature, we give a description of histological pattern, the possible pathogenesis and classification.
  
  
  CONCLUSIONS
  Surgical therapy provides the chance for tumour removal. It provides an excellent outcome when performed completely.
authors.affiliation: Klinikum Chemnitz gGmbH, Krankenhaus Küchwald, Klinik für Thoraxchirurgie, Chemnitz. a.ehricht@skc.de
authors.forename: A
authors.initials: A
authors.lastname: Ehricht
authors.forename: F
authors.initials: F
authors.lastname: Pützschler
authors.forename: K
authors.initials: K
authors.lastname: Weissmann
authors.forename: M
authors.initials: M
authors.lastname: Klenske
mesh_terms: D000328:Adult; D002828:Choristoma / Q000000981:diagnostic imaging / Q000473:pathology / Q000601:surgery*; D003937:Diagnosis, Differential; D006801:Humans; D008297:Male; D008476:Mediastinal Cyst / Q000000981:diagnostic imaging / Q000473:pathology / Q000601:surgery*; D008477:Mediastinal Diseases / Q000000981:diagnostic imaging / Q000473:pathology / Q000601:surgery*; D010179:Pancreas; D010192:Pancreatic Pseudocyst / Q000473:pathology; D013908:Thoracotomy; D014057:Tomography, X-Ray Computed