Figure 8a. Venous malformation of the left arm. (a) Clinical photograph of the left arm demonstrates a soft-tissue lump. The bluish discoloration of the overlying skin suggests a venous malformation. (b) Sagittal spin-echo T1-weighted MR image reveals infiltration of the subcutaneous fat by a low-signal-intensity mass. Dysmorphic veins are present in the vicinity of the mass (arrow).