Head and Neck Imaging

Ohngren's line

plane passing through the medial canthus and the mandibular angle. It divides the maxillary sinus into a superoposterior part (called the suprastructure) and an inferoanterior structure (called the infrastructure). This division of the maxillary sinus is important in the T-classification of maxillary sinus tumours. Malignancies limited to the infrastructure are said to have a better prognosis (see maxillary sinus, pathology ).

RH