PRTN3 and granulomatosis with polyangiitis: Here, we discuss the diagnosis and management of a patient presenting with multiple CN palsies following influenza B infection who was initially suspected to have GPA (due to positive cytoplasmic antineutrophil cytoplasmic antibody (c-ANCA), cranial polyneuropathies, and possible nasopharyngeal involvement) but was ultimately diagnosed with IHP which was evident on diagnostic imaging.