Book excerpt: Imaging of Paranasal Sinuses is explored in this important Neuroimaging Clinics issue. Articles include: Current trends in sinonasal imaging; Normal anatomy and anatomic variants of the paranasal sinuses on CT; Pre-treatment imaging in inflammatory sinonasal disease; The role of CT and MRI in imaging of fungal sinusitis; Imaging approach to sinonasal tumors; The role of CT and MRI in imaging of sino-nasal tumors; The role of CT and MRI in the skull base in evaluation of sino-nasal disease; Post-treatment imaging of the paranasal sinuses following endoscopic sinus surgery; Post-treatment imaging of the paranasal sinuses following treatment for sinonasal neoplasia; and more!