Application of intraoperative duplex ultrasound in 7 cases of Oligodendroglioma

Objective:To explore the value of intraoperative ultrasound (IOUS) in oligodendroglioma. Methods:The intraoperative ultrasound images of 7 patients with supratentorial oligodendroglioma confirmed by pathology were analyzed. IOUS images are stored and analyzed by the same examiner according to the unified image quality standard. B mode is used to evaluate the location, size, echo, boundary, shape and other signs of the lesions, and D mode is used to evaluate the Doppler blood flow signals of the lesions. Results:The mean maximum diameter of 7 oligodendrogliomas is 5.2 cm, and 71.4% of the lesions are less than 1 cm from the edge of the lesion to the meninges. 85.7% has slightly hyperechoic mass, 85.7% has clear boundary, 57.1% has irregular shape, 71.4% has different shapes of hyperechoic and 71.4% has Adler blood flow classification of Grade 3. Conclusions:The B mode of IOUS can be used for real-time locating and intraoperative monitoring of oligodendroglioma. The D mode of blood flow information can help locate the important blood vessels in the brain and carry out intraoperative early warning. There are different hyperechoic patterns, such as spot, slice, arc, linear and nodular, in the brain lesion images without acoustic shadow at the back, indicating the high possibility of calcification, which is helpful to the imaging classification of glioma.