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What is Ohngren's line extends from- and explain in detail?
Ans. is 'b' i.e., Medial canthus of eye to angle of mandible Qhngren's lineo In head and neck cancer, Ohngren's line is a line that connects the medial canthus of the eye to the angle of the mandibleo The line defines a plane orthogonal to a sagittal plane that divides the maxillary sinus into (1) an anterior-inferior part, and (2) a superior-posterior part.o Tumours that arise in the anterior-inferior part, i.e. below Ohngren's line, generally have a better prognosis than those in the other groupo Addition to above a vertical line through pupil is also considered, which divides the above mentioned structures into 4 different regions. The structures at posterosuperior medial have worst prognosis and that at anteroinferior medial are least dangerous.