FIG 1. MR image of hypothalamic hamartoma. Top row, pre- (A) and postcontrast (B) T1-weighted sagittal images T2-weighted coronal image (C). Bottom row, T2-weighted axial images at the level of the supracellular cistern (D) and the interpenduncular fossa (E). Panel F shows a diffusion-weighted image acquired at the level of the interpenduncular fossa. Note the lack of contrast enhancement of the hamartoma (B); signal intensity of the harmartoma is similar to that of cortical gray matter and the amygdala (C). Dorsal fusion with the mammilary body is also apparent (F).