Montani et al identified findings on a high resolution CT scan which may indicate that a patient with pulmonary arterial hypetension (PAH) has pulmonary veno-occlusive disease (PVOD). A patient with PVOD may not respond to therapy for PAH, so it is important to identify this subgroup when planning therapy. The authors are from Universite Paris-Sud, Universite Pierre et Marie Curie, and multiple hospitals in Paris.
