Can be clinical diagnosis - early diagnosis is critical to limiting spread of disease
CT scan of sinuses with IV contrast can assist with diagnosis and surgical planning
Histopathology is confirmatory
Mucormycosis
Upper respiratory infection, influenza
Blastomycosis
Sinusitis
Coccidioidomycosis
Juvenile nasopharyngeal angiofibroma
Paracoccidioidomycosis
Nasal polyp