ORIGINAL
Introdução: O forame oval é uma abertura localizada na asa maior do osso esfenoide que permite a passagem do nervo mandibular, a artéria meníngea acessória, o nervo petroso menor e a veia emissária. É importante compreender as variações na morfologia para distinguir potenciais forames anormais. Objetivo: O estudo tem o objetivo de reportar uma variação unilateral da morfologia do forame oval, que contém duas aberturas internas e duas aberturas externas, e relacioná-la com possíveis consequências. Métodos: Estudo realizado em uma peça de crânio humano do acervo da instituição. Os dados foram coletados e as medidas do diâmetro interno e externo dos forames ovais esquerdo e direito foram analisadas. Resultados: A partir de uma comparação feita entre os forames ovais esquerdo e direito foi demonstrado que o forame esquerdo, com a variação, tem um diâmetro significantemente menor, podendo trazer algumas consequências para o paciente. Conclusão: É essencial saber precisamente a base anatômica do crânio para evitar problemas em alguns procedimentos. Por essa perspectiva, é possível concluir que a diferença significativa pode provocar complicações no campo médico.
Introduction: The foramen ovale is an opening located in the greater wings of the sphenoid bone which allows the passage of the mandibular nerve, the accessory meningeal artery, the lesser petrosal nerve, and the emissary vein. It is important to comprise the variations of its morphology to distinguish potentially abnormal foramina. Objective: The present study aims to report a unilateral variation in the morphology of the foramen ovale, with two internal openings and two external openings, and relation to possible consequences. Methods: A study was carried out with a bone piece of human skull, part of the collection of the institution. Data was collected and the measures of internal and external diameter of right and left foramina ovalia of the skull were analyzed. Results: A comparison was made between the left and right side and demonstrated that the right foramen, with the variation, had a significant smaller diameter than the left one, and this can bring some consequences to the patient. Conclusion: It is essential to know the precise anatomy of skull base to avoid problems in some procedures. From this perspective, it is possible to conclude that the significant difference in size can trigger clinical and surgical complications.
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(1) Medical Student, Faculty of Medicine of Catanduva, Catanduva, SP, Brazil.
(2) Biomedicine, MSc, PhD, Department of Anatomy, Faculty of Medicine of Catanduva, Catanduva, SP, Brazil.
Received Apr 8, 2022
Accepted Apr 10, 2022
