The imaging presentations of the fallopian canal cerebrospinal fluid leaking
10.3760/cma.j.cn115330-20231124-00240
- VernacularTitle:面神经管脑脊液漏的影像学表现
- Author:
Linsheng WANG
1
;
Lihong ZHANG
;
Shanfeng LIU
;
Na HU
;
Jinye LI
;
Shuzhen HAO
;
Ruozhen GONG
Author Information
1. 山东省耳鼻喉医院影像中心，济南 250023
- Keywords:
Fallopian canal;
Cerebrospinal fluid otorrhea;
Tomography, X-ray computed;
Magnetic resonance imaging
- From:
Chinese Journal of Otorhinolaryngology Head and Neck Surgery
2024;59(2):147-151
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To summarize the imaging presentations of the fallopian canal cerebrospinal fluid leaking (FCCFL).Methods:The high resolution CT (HRCT)and MRI materials of 4 patients (4 ears) with FCCFL confirmed by surgery between August 2016 to November 2023 were retrospectively analyzed. Among these, there were 2 males and 2 females, their ages ranged from 6 to 69 years.Results:All of the FCCFL were unilateral, including 2 on the left and 2 on the right.Clinically, the patients with FCCFL suffered from clear nasal fluid flow, ear tightness, and hearing loss. On CT, all of the affected ears were depicted markedly dilatation of the proximal portion of fallopian canal(FC), the labyrinthine segment and geniculate fossa were involved in 4 cases, and involvement of tympanic segment in 1 case at the same time. The geniculate fossa in the affected side were significantly enlarged, protruding upwards into the tympanic cavity, with one case simultaneously involving the cochlea. On MRI, the hyposignal on T 1WI and hypersignal on T 2WI or water sequence like cerebrospinal fluid (CSF) were shown in the enlargement FC, without diffusion restriction, and non-enhancing with administration Gadolinium contrast.CSF-like signal effusion was shown in all of the affected tympanum, of which, the CSF-like signal effusion was demonstrated in the area along the superficial petrosal nerve, the right pterygopalatine fossa and the parapharyngeal space. The adjacent intracranial meninges were presented thickening in 3 cases. Conclusion:The imaging appearances of FCCFL present some characteristics:on HRCT, the proximal portions of the affected FC depicts markedly enlargement,especially the geniculate fossa.While they present CSF-like signal, no diffusion restriction, and no enhancement administration, Gadolinium contrast on MRI, accompanying the CSF-like signal effusion in the affected tympanum.
