title: Posterior mediastinal melanoma causing severe dysphagia: a case report.
abstract: BACKGROUND
  We describe an original case of progressive severe dysphagia caused by a posterior mediastinal metastatic melanoma of unknown origin. To the best of our knowledge, such an event has never been described before in the literature.
  
  
  METHODS
  A progressive severe dysphagia case is reported induced by a melanoma of unknown origin (metastatic to a posterior mediastinal lymph node). At the time of diagnosis, the lesion appeared as a large posterior mediastinal mass mimicking a neurogenic tumour with oesophageal involvement. After complete resection, pathological assessment of the tumour by immunohistochemistry was consistent with nodal metastatic melanoma.
  
  
  CONCLUSIONS
  This report of a posterior mediastinal lymph node melanoma is unique. The nodal origin is definitely unusual: a primary melanoma should always be carefully ruled out. In fact no other evidence, a part from the absence of the tumour elsewhere, can support the diagnosis of a primary nodal melanoma.
authors.affiliation: Department of Thoracic Surgery, Catholic University, 'Agostino Gemelli' Hospital, Rome, Italy. emeacci@rm.unicatt.it
authors.forename: Elisa
authors.initials: E
authors.lastname: Meacci
authors.forename: Antonino
authors.initials: A
authors.lastname: Mulè
authors.forename: Alfredo
authors.initials: A
authors.lastname: Cesario
authors.forename: Claudia
authors.initials: C
authors.lastname: Maggiore
authors.forename: Stefano
authors.initials: S
authors.lastname: Margaritora