title: Prognostic implication of the lymphangitic carcinomatosis pattern on perfusion lung scan.
abstract: OBJECTIVE
  Findings not associated with thromboembolic disease on routine perfusion lung scan may sometimes have particular clinical significance. We wanted to assess the clinical importance and overall survival after the recognition of a lymphangitic carcinomatosis pattern on perfusion lung scan.
  
  
  METHODS
  We report a case of lymphangitic carcinomatosis pattern on perfusion lung scan performed in a previously healthy patient who had rapid progressive course and died the next day.
  
  
  METHODS
  A Medline search of case reports that describes either lymphangitic carcinomatosis or tumour microemboli on perfusion lung scan.
  
  
  RESULTS
  There were a total of 32 patients identified in 21 articles from various countries, including our case. The studied perfusion pattern was reported more often in female patients (81%) was associated with a progressive history of dyspnea (69%) and normal or mild findings on chest radiograph (58%). Of the 29 patients with available outcome data, 79% (23/29) had a progressive course after the lung scan interpretation. In 18 of these 23 cases, the actual interval of survival was given: 67% of these patients (12/18) died within the first month.
  
  
  CONCLUSIONS
  A lymphangitic carcinomatosis perfusion pattern on scintigraphic imaging is associated with a poor prognosis. Nuclear medicine physicians should be aware of this association and that raising the suspicion for a metastatic process may make a difference in the treatment plan of these patients.
authors.affiliation: Diagnostic Imaging Department, Lakeshore General Hospital, Montreal, Quebec, Canada. charestm@hotmail.com
authors.forename: Mathieu
authors.initials: M
authors.lastname: Charest
authors.forename: Shadia
authors.initials: S
authors.lastname: Armanious
mesh_terms: D000328:Adult; D002277:Carcinoma / Q000000981:diagnostic imaging*; D003937:Diagnosis, Differential; D017809:Fatal Outcome; D005260:Female; D006801:Humans; D008175:Lung Neoplasms / Q000000981:diagnostic imaging*; D008223:Lymphoma / Q000000981:diagnostic imaging*; D011379:Prognosis; D011877:Radionuclide Imaging; D014057:Tomography, X-Ray Computed