Fig. 5From: Screening and treatment of brain metastasis from papillary thyroid carcinoma: a case seriesPre and post radiosurgery Cerebral metastatic lesion (a): Pre-radiosurgery MRI showing the left frontal lesion with marked contrast enhancement (upper row). b: Three months post-treatment MRI showing no significant change in tumor dimensions but a reduction in contrast-enhanced portion and an increase in the necrotic part (lower row)Back to article page