[The value of magnetic resonance hydrography in the localization of fistula in patients with cerebrospinal fluid rhinorrhea].

To evaluate the application value of magnetic resonance hydrography in determine the leak location of patients with cerebrospinal fluid rhinorrhea. Clinical data of 58 patients with cerebrospinal fluid rhinorrhea treated in Tianjin Huanhu Hospital from February 2015 to February 2021 were analyzed retrospectively. The leak position was judged by three methods: nasal sinus coronal CT, magnetic resonance hydrography and magnetic resonance hydrography combined with nasal sinus coronal CT. The consistency of the leak position among groups determined by different imageological examination pre-operation was compared with the real leak position found during the operation. The positive rate of magnetic resonance hydrography combined with coronal CT in paranasal sinuses（91.4%） was significantly higher than that of magnetic resonance hydrography（74.1%）（>0.05）. The positive rate of magnetic resonance hydrography（74.1%） was higher than that of CT（43.1%）（>0.01）. The comprehensive application of imaging examination technology has important clinical guiding significance for the correct diagnosis of cerebrospinal fluid rhinorrhea. Magnetic resonance hydrography combined with coronal CT of paranasal sinus can effectively find the leak location, which was suggested as the first choice for preoperative localization of cerebrospinal fluid rhinorrhea.