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Aims: Study of foramen Ovale is of great surgical importance in procedures like percutaneous trigeminal rhizotomy for trigeminal neuralgia, electroencephalographic analysis for seizure and diagnostic transfacial fine needle aspiration technique in perineural spread of tumour. Localization of the foramen ovale can be difficult due to imaging quality (improved by biplanar radiology systems), operator inexperience and anatomical variations. Methods and Material: The present study was conducted over 100 dry human skulls obtained from Anatomy department, Govt. Medical College, Surat and B.J.Medical college Ahmedabad, Gujarat. In this study presence of anatomic variations in shape of foramen ovale was noted and length and width of foramen were measured. Comparison between right and left was done. Results: Mean length of foramen ovale was 6.5mm and mean width was 3.5mm. There was no significant difference between mean of the length and width of the right and left foramen ovale. Foramen ovale was typically oval in 119 sides, almond in 12 sides, round in 55 sides and slit like in 2.There was accessory foramina in front of foramen ovale in one case and presence of septation in one case. Conclusions: Anatomical variations in size and shape of foramen ovale could be explained by developmental reasons. Considering the surgical and diagnostic importance of foramen ovale, this study was worthwhile.

Morphometry of Foramen Ovale at base of skull in Gujarat