A rare case of small-vessel necrotizing vasculitis of the bone marrow revealing granulomatosis with polyangiitis. (17th December 2020) - Broner, Jonathan; Arnaud, Erik; Bisiou, Sirivanh; Artiaga, Agathe; Fantone, Myriam; Gonzalez, Samia; Goulabchand, Radjiv