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Click 14-month-old female with duplication of the massa intermedia. Sagittal T1WI demonstrate two distinct round structures in the 3rd ventricle representing duplication of the massa intermedia. The anterior massa intermedia measures 3 x 3 x 3 mm while the posterior MI measures 2 x 2 x 2 mm. Small pineal cyst and intrasellar pars intermedia cyst are incidentally present.
TECHNIQUE: 1.5T MR (General Electric, Milwaukee, WI). Sagittal midline T1 Fast Spoiled Gradient Echo (FSPGR) image (TR/TE/IT = 11/2/500).

Click 14-month-old female with duplication of the massa intermedia. Axial T1WI demonstrate two distinct round structures in the 3rd ventricle representing duplication of the massa intermedia.
TECHNIQUE: 1.5T MR (General Electric, Milwaukee, WI). Sagittal midline T1 Fast Spoiled Gradient Echo (FSPGR) image (TR/TE/IT = 11/2/500).