ANCA-Negative Granulomatosis of Polyngiitis of Paranasal Sinuses with Cerebellar Involvement. - Mahmutoglu, Abdullah Soydan; Duzkalir, Hanife Gulden; Erdal, Yuksel; Mahmutoglu, Ozdes; Karagoz, Yesim (Indian Journal of Otolaryngology & Head & Neck Surgery (Springer Nature), 2024)