Figure 5b. Venous malformation of the right plantar region. (a) Spin-echo T1-weighted MR image shows diffuse enlargement of the medial plantar muscles. The lesion is hypointense and is difficult to differentiate from the normal muscular structures. (b) STIR T2-weighted image (512 matrix) clearly demonstrates the malformation within the plantar muscles. (c, d) Unenhanced (c) and contrast-enhanced (d) coronal T1-weighted images show perfusion of the malformation, which involves the first three layers of the plantar muscles.