Journal of International Oncology ›› 2020, Vol. 47 ›› Issue (12): 712-715.doi: 10.3760/cma.j.cn371439-20200802-00106

• Orginal Article • Previous Articles     Next Articles

Application of susceptibility weighted imaging in the diagnosis and differential diagnosis of intracranial metastatic tumors

Wang Hui1, Liu Rong1, He Juan1, Batuer Tuerdi1, Yu Taifei2(), Aihemaiti Tuohuti1   

  1. 1Department of Radiology, People's Hospital of Xinjiang Uygur Autonomous Region, Urumqi 830000, China
    2Shandong Medical Imaging Research Institute, Jinan 250000, China
  • Received:2020-08-02 Revised:2020-10-20 Online:2020-12-08 Published:2021-01-28
  • Contact: Yu Taifei E-mail:yutaifei@163.com

Abstract:

Objective To explore the value of susceptibility weighted imaging (SWI) in differential diagnosis of intracranial metastatic tumors. Methods Sixty-three patients with intracranial metastatic tumors (primary tumors of lung cancer, breast cancer, kidney cancer, rectal cancer, bladder cancer and melanoma) and glioblastomas in People's Hospital of Xinjiang Uygur Autonomous Region from January 2018 to April 2020 were collected, and the intratumoral susceptibility signal intensity (ITSS) was evaluated semi-quantitatively. The grading characteristics of ITSS of metastatic tumors and glioblastomas were compared. Results Among the 81 intracranial metastatic tumors, 36 (44.4%) were grade 0, 25 (30.9%) were grade Ⅰ, 14 (17.3%) were grade Ⅱ and 6 (7.4%) were grade Ⅲ. Among the 27 glioblastomas, 27 (100%) were grade Ⅱ-Ⅲ. Grade 0-Ⅰ metastatic tumors of lung cancer accounted for 73.6% (28/38). Grade 0 metastatic tumors of breast cancer accounted for 84.6% (22/26). Grade Ⅱ metastatic tumor of kidney cancer accounted for 5/6. Grade 0-Ⅰ metastatic tumors of rectal cancer accounted for 4/5. Grade Ⅲ glioblastomas accounted for 77.8% (21/27). The difference of ITSS classification between intracranial metastatic tumors and glioblastomas was statistically significant (Z=7.013, P<0.001). According to the receiver operating characteristic curve analysis, the sensitivity and specificity of ITSS ≤grade Ⅰ were 100% and 75.3% respectively, and the area under the curve was 0.936 (95%CI: 0.891-0.980, P<0.001). Conclusion The patients with intracranial metastatic tumor usually present ITSS grade 0-Ⅰ, and the patients with glioblastoma usually present ITSS grade Ⅱ-Ⅲ. SWI has a certain value for differential diagnosis of intracranial metastatic tumors.

Key words: Neoplasm metastasis, Glioblastoma, Susceptibility weighted imaging