Rutten M J, Collins J M, van Kampen A, Jager G J
Department of Radiology, University Hospital Nijmegen, The Netherlands.
AJR Am J Roentgenol. 1998 Aug;171(2):491-6. doi: 10.2214/ajr.171.2.9694482.
The purpose of this study was to determine the feasibility of high-resolution sonography for the detection of meniscal cysts and associated meniscal tears and for the differentiation of meniscal cysts from other masses at the knee joint.
Fifty consecutive patients (51 knees) with a palpable mass at the knee joint were examined prospectively using a 7.5-MHz annular array transducer. Mass consistency and location and meniscal integrity were evaluated. Sonographic findings were correlated with surgery (46/51) and histopathology (15/51). Five patients did not undergo surgery.
At surgery, 32 masses appeared to be meniscal cysts, whereas 19 were other types of masses. Sonographically, 31 of the 32 meniscal cysts were diagnosed correctly. Sonographic differentiation of the other types of masses from meniscal cysts could reliably be made in 17 of 19 cases; two masses were falsely interpreted as meniscal cysts. Sensitivity, specificity, and accuracy of sonography in the depiction of meniscal cysts were 97%, 86%, and 94%, respectively. The positive predictive value was 94% and the negative predictive value was 92%. Meniscal tears (31/46) and meniscal tears concomitant with meniscal cysts (26/32) were detected with an accuracy of 83% and 88%, respectively.
Sonography is an accurate imaging technique for the detection of meniscal cysts and associated meniscal tears. Differentiation of meniscal cysts from other cystic and solid masses at the knee joint can be reliably made with sonography.
本研究的目的是确定高分辨率超声检查在检测半月板囊肿及相关半月板撕裂以及区分半月板囊肿与膝关节其他肿物方面的可行性。
对50例连续的膝关节可触及肿物患者（51个膝关节）使用7.5兆赫环形阵列换能器进行前瞻性检查。评估肿物的质地、位置及半月板完整性。超声检查结果与手术结果（46/51）及组织病理学结果（15/51）进行对照。5例患者未接受手术。
手术中，32个肿物为半月板囊肿，19个为其他类型肿物。超声检查时，32个半月板囊肿中有31个被正确诊断。19例其他类型肿物中，有17例可通过超声可靠地与半月板囊肿区分；2个肿物被误诊为半月板囊肿。超声检查在显示半月板囊肿方面的敏感性、特异性和准确性分别为97%、86%和94%。阳性预测值为94%，阴性预测值为92%。半月板撕裂（31/46）及合并半月板囊肿的半月板撕裂（26/32）的检测准确率分别为83%和88%。
超声检查是检测半月板囊肿及相关半月板撕裂的准确成像技术。超声可可靠地区分半月板囊肿与膝关节其他囊性和实性肿物。
