Eustachian tube extends from the anterior wall of the middle ear to the lateral wall of the nasopharynx at the level of inferior nasal choncha. It maintains the equilibrium of air. It is an important landmark for endoscopic evaluation in patients with chronic otitis and also for the transnasal approach to the infratemporal fossa. MATERIALS AND METHODSStudy was carried out, 50 sagittal sections (25 right side and 25 left side) of head and neck specimens from adult formalin fixed cadavers from the Department of Anatomy, Krishna Institute of Medical Sciences Deemed University, Karad, Maharashtra, India. The pharyngeal opening of Eustachian tube was observed for its shape, size and important measurements taken with the help of sliding vernier calliper. The mean and standard deviation of these parameters were calculated. RESULTSThe vertical length and A-P length was taken and shape was observed. Oval shape more common on right side (52%) and triangular on left (48%). The A-P length on right side was 8.7 mm on right and 7.6 mm on left side, which was statistically significant. The height was more on right side than on left side. CONCLUSIONIn the present work, the exact position of auditory tube can be located by various measurements. So the study will be helpful for radiologist for differential diagnosis and ENT surgeons for endoscopic evaluation in patients with chronic otitis media.

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