54-year-old male with history of colon/rectal cancer Large area of vasogenic edema and high convexity left frontal lobe contains an internal area of soft tissue density with central lucency. This finding is believed to represent a necrotic metastatic lesion which measures 28-mm x 26-mm in transaxial dimension (image 18). The edema causes subtle focal mass effect and no evidence of midline shift. No evidence of an additional lesion is detected. Further evaluation with dedicated MRI of brain with infusion is recommended.The bony density of calvarium demonstrates no evidence of metastatic lesions.
Large necrotic mass with surrounding vasogenic edema in left high convexity frontal lobe consistent with a metastases lesion.