tiefe Fossa olfactoria

An additional

challenge for head and neck radiologists: anatomic variants posing a surgical risk – a pictorial review. Anatomic variants of the ethmoid roof. CBCT (a) shows clear asymmetry, the slope of the right vertical lamella (arrow) being more pronounced than on the contralateral side. b MDCT shows a deep olfactory fossa (type III according to the Keros classification)