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Endoscopic prelacrimal recess approach is a promising technique for treating various maxillary sinus diseases because it allows for adequate visualization and wide access to the entire maxillary sinus. However, the incidence of absent prelacrimal recess (PLR) has ranged from 7% to 17.5%, implying that there is a limitation for the application of EPLA in this population. Here, a male patient with concomitant Krouse T2 maxillary inverted papilloma and mycetoma presenting with unilateral nasal obstruction and blood-tinged secretion is described. The presurgical computed tomography showed no recess. By dislocating the nasolacrimal duct from the bony canal and removing the medial maxillary wall sufficiently to extend the surgical corridor; and by preserving the inferior turbinate, nasal mucosa, and nasolacrimal duct, the patient did not experience any postoperative complications. In conclusion, our modified technique may be an effective and safe strategy for treating maxillary sinus disease without prelacrimal recess.

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Cerebrospinal fluid (CSF) leak and encephalocele from the middle cranial fossa into the sphenoid sinus lateral recess (SSLR) is a rare condition. It is often associated with obesity, female sex, well-pneumatized sinus, and prolonged intracranial hypertension. Endoscopic repair has emerged as the mainstay treatment with a success rate increasing to over 90% by refining reconstruction methods and controlling intracranial pressure. Here, we describe how a female with SSLR CSF leak and encephalocele successfully managed with endoscopic transpterygoid approach and multilayered repair. The defect was closed using four indifferent tissues, including the duragen patch, sinus mucosal flaps, the middle turbinate bone, and free mucosa flap, from the inside out. The patient had an uneventful postsurgical course and remained disease-free during the 9-month follow-up. To conclude, the technique of using sinus mucosal flaps in the context of multilayered reconstruction might be a useful method to repair CSF leak.

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