Lusk R P, Lee P C
Otolaryngol Head Neck Surg. 1986 Oct;95(3 Pt 1):303-6. doi: 10.1177/01945998860953P107.
Congenital midline nasal masses are rare lesions with potential intracranial extensions. Thus, thoughtful preoperative evaluation is essential in planning the appropriate surgical approach, to prevent such complications as cerebral spinal fluid leaks and meningitis. Preoperative computerized tomographic (CT) scans are useful in visualizing bony defects, but are not well suited for soft tissue imaging. Magnetic resonance imaging (MRI) is the latest advance in cross-sectional imaging technology. It offers superior soft tissue contrast, is noninvasive, and does not use ionizing radiation. It is particularly useful in imaging encephaloceles. Three cases of congenital midline masses are presented as illustrations. Two dermoid cysts demonstrate the usefulness of MRI in ruling out intracranial extension. A large encephalocele dramatically demonstrates the superiority of MRI in imaging the brain herniating into the nose. Since MRI is noninvasive and does not use ionizing radiation, it should be considered before CT scanning, to rule out intracranial extension.
先天性中线鼻部肿物是一种罕见的病变，具有潜在的颅内扩展。因此，在规划合适的手术方法时，进行周全的术前评估至关重要，以预防诸如脑脊液漏和脑膜炎等并发症。术前计算机断层扫描（CT）有助于观察骨质缺损，但不太适合软组织成像。磁共振成像（MRI）是横断面成像技术的最新进展。它提供卓越的软组织对比度，无创且不使用电离辐射。它在脑膨出成像方面特别有用。本文展示了三例先天性中线肿物病例。两个皮样囊肿显示了MRI在排除颅内扩展方面的作用。一个巨大的脑膨出显著证明了MRI在成像疝入鼻腔的脑组织方面的优越性。由于MRI无创且不使用电离辐射，在进行CT扫描之前应考虑使用MRI，以排除颅内扩展。
