|
Uterine leiomyoma：MRI findings and histopathology<?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" />
宋宁 陆建平 何新红 王飞 刘崎 王莉
第二军医大学长海医院放射科，上海 200433
Ning SONG, Jian-ping LU, Xin-hong HE, Fei WANG, Qi LIU, Li WANG
Department of Radiology, Changhai Hospital, The Second Military Medical University, Shanghai 200433
Abstract
Objective：To discuss the MR imaging findings of uterine leiomyoma and contrast with histopathology, and evaluate its diagnostic value.
Methods：MRI scanning was performed for 30 patients with suspected uterine leiomyomas by Ultrasound (US). Ability of detecting of uterine leiomyomas were calculated and compared with US. Comparative analysis between MRI finding and pathology results was done.
Results：There were 64 lesions in 30 cases. The difference between the number of lesions detected by two modalities had statistical significance (90.6% for MRI vs 68.8% for ultrasound,χ2=14.57, P<0.05). MRI diagnosis in all cases was consistent with the results given by surgery and pathology, except 1 being diagnosed hydatidiform mole. The diagnostic accuracy of MRI was 96.7%. The accuracy of ultrasound was 86.7%. T2WI could manifest the structure of the uterus clearly .The sagittal plane could show the uterine position and relationship with uterine cavity. Almost all the leiomyoma showed slight hypointensity or isointensity on T1-weigthed images. Most ordinary leiomyomas displayed hypointensity on T2-weigthed images. Most cellular and degenerated leiomyomas manifested as hyperintensity on T2-weigthed images. Most ordinary leiomyoma showed homogenously enhancement, but lower than the myometrium. Most cellular and degenerated leiomyomas presented homogenously enhancement and mild enhancement respectively.
Conclusion：MRI is a highly sensitive method for the evaluation of uterine leiomyoma. The signal intensity on MRI has bearing on the histopathology. Certain characteristic features on MRI were different in leiomyomas with different pathological subtype.
Key words：Uterine neoplasms; Leiomyoma; Magnetic resonance imaging; Pathology | 
