Figure 3

Metastatic disease from extragastrointestinal GIST. a) The axial T1-w MR image shows an intermediate signal intensity ovoid-shaped mass, lateral to the gluteus maximus muscle, within the subcutaneous fat (arrow). An intact fat plane separated the mass from the muscle. b) The fat suppressed T2-w TSE MR image, shows the high signal intensity of the central mass and the intermediate signal intensity of the anterior wall (open arrow). A second smaller lesion with similar imaging characteristics is shown in the right gluteus maximus muscle (thin arrow). c) The contrast enhanced fat suppressed T1-w SE MR image shows the peripheral enhancement of the wall (open arrow). The central non enhancing component presumably corresponds to necrosis. Ring-like enhancement is also shown in the smaller lesion (thin arrow).