초음파를 이용한 표재성신경초종의 분석: 초음파기기 주파수 및 종양의 변성이 후방음파증강에 미치는 영향

초록

We retrospectively analyzed the sonographic findings of 18 pathologically proven superficial neurilemmomas in 17 patients during recent 5 years. We evaluated the contuor, size and internal echo pattern of the tumor, the presence of tumor capsule, and the degree of acoustic enhancement behind the tumor. We correlated the posterior acoustic enhancement with the pathologic features. Eighteen tumors showed oval or round in contuor and 9 tumors revealed hypoechoic pattern, 3 tumors revealed homogenously echogenic pattern and 6 tumors revealed heterogenously echogenic pattern. Sixteen tumors showed the capsule of tumor. Fourteen tumors showed posterior acoustic enhancement. Grade Ⅰ posterior acoustic enhancements were noted at 10 MHz transducer examination only and Grade Ⅱ posterior acoustic enhancements were noted at 5 MHz or 7.5 MHz tranducer examination. No definite correlation between hemorrhagic or cystic degenerations of superficial neurilemmomas and Grade Ⅱ posterior acoustic enhancements were noted. The mean size of hypoechoic superficial neurilemmoma was smallest and that of heterogenously echogenic superficial neurilemmoma was largest. We conclude that sonographic exammination was useful for evaluation of superficial neurilemmoma.