• Ezel Yaltirik Bilgin, Ozkan Unal, and Nazan Ciledag.
• Department of Radiology, Dr. Abdurrahman Yurtaslan Ankara Oncology Training and Research Hospital, Ankara, Turkey.
• J Coll Physicians Surg Pak. 2022 Aug 1; 32 (8): 1020-1025.

ObjectiveTo determine the relationship of the presence and amount of vasogenic edema with origin, type, and grade of primary cancer.Study DesignCross-sectional study.Place And Duration Of StudyDr. Abdurrahman Yurtaslan Ankara Oncology Training and Research Hospital, Radiology Clinic, Ankara, Turkey, from July 2017 to October 2021.MethodologyBrain MRI scans of 292 patients were retrospectively evaluated. Age, gender, origin, type, and grade of primary cancer were determined. Metastasis type, and presence of vasogenic edema accompanying metastatic lesion were questioned. In cases of vasogenic edema accompanying metastatic lesions, the largest diameter of the vasogenic edema mass complex was measured in T2 sequences. In the contrast-enhanced series, the largest diameter of the metastatic lesion was measured, and the edema-mass ratio (EMR) was calculated by proportioning the diameter of the edema mass complex to the diameter of the mass.ResultsThe frequency of vasogenic edema was found higher in patients with lung cancer compared to other primaries. The EMR was found statistically significantly higher in patients with primary lung cancer (p=0.001). This was particularly evident in the adenocarcinoma group. In the patient group with primary breast cancer, EMR was found significantly lower in patients with invasive ductal carcinoma. (IDC→1.95±0.66 vs. Other→2.48±0.52, Z=-2.301, p=0.021).ConclusionThe amount and presence of vasogenic edema in patients with brain metastases may differ according to the origin and type of primary tumour.Key WordsBrain edema, Metastatic disease, Magnetic resonance imaging.

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