Normal variations in the paranasal sinus region are well documented in literature. We present five cases of a little known normal variant, which can have serious implications for the patient as well as the operating surgeon. An ectopic infra orbital nerve canal coursing through the maxillary sinus has rarely been described in imaging literature. This may sometimes be mistaken for a simple septum in the maxillary sinus and may cause serious complications during Functional Endoscopic sinus surgery (FESS) surgeries. We describe the imaging findings and present a brief review of the previous publications on the same subject.

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Variasi normal di daerah sinus paranasal terdokumentasi dengan baik pada literatur. Kami menyajikan lima kasus varian normal yang diketahui, yang dapat memiliki implikasi serius bagi pasien dan juga ahli bedah operasi. Kanal saraf infra orbital ektopik pada sinus maksila jarang dijelaskan dalam literatur pencitraan. Terkadang hal ini dianggap septum sederhana di sinus maksila yang dapat mengalami komplikasi serius selama operasi functional endoscopic sinus surgery (FESS). Kami menggambarkan temuan pencitraan dan menyajikan ulasan singkat dari publikasi sebelumnya mengenai topik yang sama.