Legend Conventional radiographs show opacification of the frontal sinus, with bony discontinuity anteriorly and extension into the anterior soft tissues.

Legend CT images show additional maxillary and ethmoid sinus opacification with bony thickening and irregularity. Legend Coronal CT images confirm the sinus opacification and gas liquid levels of infectious sinusitis. Key words: infection inflammation

ENT Diagnosis Frontal sinus abscess