NGHIÊN CỨU GIÁ TRỊ CỦA CỘNG HƯỞNG TỪ TRONG CHẨN ĐOÁN U MÀNG NÃO VÙNG GÓC CẦU TIỂU NÃO

Abstract

Introduction: Magnetic resonance is considered the optimal imaging diagnostic tool for diagnosing cerebellopontine angle tumors, included meningiomas. Magnetic resonance evaluates the components, location and anatomical correclation of tumor which help the surgeon predicts the treatment, include the approach and the ability to completely remove the tumor. Purpose: the value of MRI in diagnosing meningioma in the CPA area. Methods: A retrospective study of 58 patients diagnosed with CPA tumors with pathological results at Cho Ray Hospital from January 2023 to June 2024. Results: There were 31 cases of meningioma, 24 cases of schwannoma, 2 cases of epidermoid tumor and 1 case of ependymoma. The average age, including 23 men (39,7%) and 35 women (60,3%) was 49,7 ± 13,9. Common symptoms of UMN are headache (74,2%), while those of schwannoma are tinnitus (62,5%) and dizziness (50%). When comparing the MR images between meningioma and schwannoma, the characteristics of tumor size, signal intensity on CISS 3D, signal intensity ratio on CISS 3D, signal intensity ratio on T2W image, average diffusion coefficient of tumor, micro haemorrhage on T2* weight, “dural tail” sign, “widening of the internal auditory canal” sign and the enhancement properties of the tumor are significant in the differential diagnosis of these two types of tumors. Conclusion: MRI plays an important role in diagnosing CPA – meningioma, especially in differential diagnosis with the most common tumor type in the CPA region, schwannoma.