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Abstract：
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.
摘要：
内窥镜泪前隐窝入路是治疗各种上颌窦疾病的一种有前途的技术，因为它可以充分可视化并广泛进入整个上颌窦。然而,泪前隐窝缺失（PLR）的发生率为7％至17.5％，这意味着EPLA在该人群中的应用受到限制。这里,描述了一名男性患者，伴有KrouseT2上颌倒置乳头状瘤和肌瘤，表现为单侧鼻塞和血液分泌。术前计算机断层扫描显示无凹陷。通过将鼻泪管从骨管中脱位，并充分去除上颌内侧壁，以延长手术走廊；并通过保留下鼻甲，鼻粘膜，和鼻泪管,患者未出现任何术后并发症.总之,我们的改良技术可能是治疗无泪前隐窝上颌窦疾病的有效和安全的策略.
