Figure 5c. Adenoma of uncertain malignant potential in a 73-year-old woman. (a) Axial in-phase FMPSPGR T1-weighted MR image (150/4.2, flip angle = 90°) shows a large (6.5-cm) mass in the left adrenal gland (arrow). There was neither hemorrhage nor necrosis within the mass, nor metastases at presentation. (b) Axial out-of-phase FMPSPGR T1-weighted MR image (150/1.8, flip angle = 90°) demonstrates no significant signal dropout (arrow). (c) On an axial fast spin-echo T2-weighted MR image (7,500/105), the mass (arrow) is isointense relative to the spleen.