Fig. 2From: A case report of isolated distal upper extremity weakness due to cerebral metastasis involving the hand knob areaContrast-enhanced axial CT (a), T2W axial MR (b), contrast-enhanced T1W axial (c) and coronal (d) MR. Intensive contrast enhancement (11 mm) in the right precentral gyrus, corresponding to the ‘hand knob’s area, with large perifocal edema. The left ‘hand knob’ is normal (arrow). Four other smaller enhancing metastases in the brain (not shown)Back to article page