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Comparison of tumor on conventional DWI and DL-DWI. A 63-year-old male visited the emergency room with symptom of transient left facial palsy. Conventional DWI shows a small DWI high-signal-intensity lesion in the right frontal cortex (a) with low ADC value (b) with perilesional edema. DL-DWI (c) demonstrated that this discrete nodular lesion had low value on ADC map (d), and the patient was diagnosed with a metastatic tumor.
