Research Journal of Medical Sciences
ISSN: Online 1993-6095ISSN: Print 1815-9346
Abstract
In our investigation of magnetic resonance (MR) imaging pertaining to extra‐axial Cerebello Pontine (CP) angle tumors, we analyzed a total of 30 cases. Extra‐axial CP angle tumors represent approximately 7‐10% of all brain tumors. Among the 30 patients assessed, schwannomas were identified as the predominant pathology, constituting 60% of the cases, followed by Meningioma at 26.7%, epidermoid tumors at 6.7% and arachnoid cysts also at 6.7%. The age group most frequently affected was between 51 and 60 years, accounting for 28% of the cases. Schwannomas, the most prevalent extra‐axial CP angle tumors, typically present as enhancing round masses that originate from the vestibular nerve near the porus acoustic us, often leading to the enlargement of the internal auditory canal. This tumor type predominantly affects individuals in their fifth to sixth decades of life, with a notable female predominance. On T1‐weighted imaging, schwannomas are generally iso‐to hypointense, while they appear hyper intense on T2‐weighted images, exhibiting heterogeneous enhancement following contrast administration. Meningiomas, the second most common extra‐axial CP angle tumors, are characterized by oval or hemispheric lesions that have a broad attachment to the tentorium or the petrous dura mater. Similar to schwannomas, the most affected demographic is also in the fifth to sixth decades, with a female predominance. Meningiomas typically show iso‐intensity to gray matter on T1‐weighted images and hyper intensity on T2‐weighted images, with homogeneous enhancement observed on contrast imaging. Epidermoid and arachnoid cysts display cerebrospinal fluid (CSF) signal intensity across all imaging sequences., however, epidermoid cysts demonstrate diffusion restriction on diffusion‐weighted imaging (DWI), whereas arachnoid cysts do not exhibit restriction on DWI and are completely suppressed on fluid‐attenuated inversion recovery (FLAIR) sequences. MR imaging is recognized as the most sensitive non‐invasive technique for characterizing extra‐axial CP angle tumors, effectively delineating the location and extent of lesions, as well as their distinctive signal characteristics and enhancement patterns following contrast administration.
How to cite this article:
B. Pravan Kumar Reddy, Kahalid Mohammed Saifullah and Katakam Usharani. MRI Evaluation of Extra Axial Cerebello Pontine Angle Tumours.
DOI: https://doi.org/10.36478/10.36478/makrjms.2024.11.572.575
URL: https://www.makhillpublications.co/view-article/1815-9346/10.36478/makrjms.2024.11.572.575