顎顔面部에 發生한 軟組織疾患의 診斷時 Ultrasonography의 應用에 관한 硏究

DIAGNOSTIC USE OF B-MODE ULTRASONOGRAPHY IN SOFT TISSUE LESIONS OF THE MAXILLOFACIAL REGIONS

Ultrasonography is known to provide valuable information concerning the size, nature and location of soft tissue lesions. So that It was utilized for diagnostic purposes for the ten years. It was originally utilized mainly in opthalmology and obstetrics and gynecology. But in recent years, it was very useful in diagnosis of soft tissue masses In oral and maxillofacial area. This technique is non-invasive and inexpensive, and has not radiation hazard when compared to computerized tomography. Ultrasonography is capable of differentiating not only cystic form solid lesions but also can be helpful in the diagnosis of malignant vs. benign masses. A ultrasonic study was performed in 5 patients with various soft tissue lesions in oral and maxillofacial region (cystic hygroma, intramuscular hemangioma, neurilemmoma, tuberculous lymphadenitis, abscess) using B-scan(gray scale) ultrasonography. The results are summerized below. 1. Cystic hygroma showed internal echo free pattern, enhancement of posterior detail and multiloculated well delineated oval shaped outline. 2. In intramuscular hemangioma, ultrasonography demonstrated internal echo free pattern and two posterior attenuation were made by two calified body. 3. Neurilemmoma showed homogenous internal echo pattern, and well delineated oval shaped outline. 4. In tuberculosis lymphadenitis, internal nature was not coincided with computerized tomography, but size and location were coincided with that. 5. Suppurative abscess on masseter muscle showed internal echo free pattern.