RT Journal Article SR Electronic T1 Anti-PD-1 Vasculitis of the central nervous system or radionecrosis? JF Journal for ImmunoTherapy of Cancer JO J Immunother Cancer FD BMJ Publishing Group Ltd SP 96 DO 10.1186/s40425-017-0304-8 VO 5 IS 1 A1 Sun, Roger A1 Danlos, Francois-Xavier A1 Ammari, Samy A1 Louvel, Guillaume A1 Dhermain, Frédéric A1 Champiat, Stéphane A1 Lambotte, Olivier A1 Deutsch, Eric YR 2017 UL http://jitc.bmj.com/content/5/1/96.abstract AB Commentary on « Cerebral vasculitis mimicking intracranial metastatic progression of lung cancer during PD-1 blockade » by Läubli H et al., J Immunother Cancer. 2017;5:46.The authors diagnosed a cerebral tumor-like lymphocytic vasculitis associated with anti-endothelial cell auto-antibodies secondary to anti-PD-1 therapy, treated by surgical resection and corticosteroids. We thought that this diagnosis should be discussed for at least two reasons. First, etiological explorations were not sufficient. Second, the diagnostic of radionecrosis should also be discussed.Abbreviations:ACNSAngiitis of the Central Nervous SystemANCAAnti neutrophil cytoplasmic antibodyMRIMagnetic Resonance ImagingPD-1Programmed cell death 1rCBVRelative cerebral blood volume