title: Pulmonary hypertension: CT of the chest in pulmonary venoocclusive disease.
abstract: OBJECTIVE
  Pulmonary venoocclusive disease is a rare cause of pulmonary hypertension that is often difficult to distinguish from severe primary pulmonary hypertension. Unfortunately, medical treatment of primary pulmonary hypertension with prostacyclin can be fatal in patients with venoocclusive disease, and an early pretreatment diagnosis of this uncommon condition is critical. The aim of our study was to evaluate this disease noninvasively using CT of the chest.
  
  
  METHODS
  We reviewed cross-referenced records from 1996 to 2001 in our departments of radiology and pathology and identified 15 patients with initial pretreatment CT scans who had pathologically confirmed pulmonary venoocclusive disease. Their CT scans were compared with the CT scans of 15 consecutive patients with pathologically confirmed primary pulmonary hypertension. All patients had undergone a postmortem or posttransplantation examination.
  
  
  RESULTS
  Ground-glass opacities were significantly more frequent in pulmonary venoocclusive disease (p = 0.003); the opacities were abundant with random zonal predominance and preferentially centrilobular distribution (p = 0.03). Subpleural septal lines and adenopathy were also significantly more frequent (p < 0.0001).
  
  
  CONCLUSIONS
  On the initial pretreatment chest CT scan, the presence of ground-glass opacities (particularly with a centrilobular distribution), septal lines, and adenopathy are indicative of pulmonary venoocclusive disease in patients displaying pulmonary hypertension. Caution should be exercised before vasodilator therapy is initiated in the patients whose scans show such radiologic abnormalities.
authors.affiliation: Service de Radiologie, UPRES EA 2705 (Maladies Vasculaires Pulmonaires), Hôpital Antoine Béclère, Assistance Publique-Hôpitaux de Paris, Université Paris-Sud, 157 rue de la Porte de Trivaux, Clamart 92140, France. arnuad.resten@abc.ap-hop-paris.fr
authors.forename: Arnaud
authors.initials: A
authors.lastname: Resten
authors.forename: Sophie
authors.initials: S
authors.lastname: Maitre
authors.forename: Marc
authors.initials: M
authors.lastname: Humbert
authors.forename: Anne
authors.initials: A
authors.lastname: Rabiller
authors.forename: Olivier
authors.initials: O
authors.lastname: Sitbon
authors.forename: Frédérique
authors.initials: F
authors.lastname: Capron
authors.forename: Gérald
authors.initials: G
authors.lastname: Simonneau
authors.forename: Dominique
authors.initials: D
authors.lastname: Musset
mesh_terms: D000328:Adult; D016022:Case-Control Studies; D005260:Female; D006801:Humans; D006976:Hypertension, Pulmonary / Q000000981:diagnostic imaging* / Q000209:etiology; D008168:Lung / Q000000981:diagnostic imaging; D008297:Male; D011668:Pulmonary Veno-Occlusive Disease / Q000150:complications / Q000000981:diagnostic imaging*; D014057:Tomography, X-Ray Computed