Pre- and Postnatal MR Imaging of Hypothalamic Hamartomas Associated with Arachnoid Cysts
Timothy N. Bootha,
Charles Timmonsb,
Kenneth Shapiroc and
Nancy K. Rollinsa
a Departments of Radiology, Children’s Medical Center of Dallas and University of Texas Southwestern Medical Center, Dallas, TX
b Departments of Pathology, Children’s Medical Center of Dallas and University of Texas Southwestern Medical Center, Dallas, TX
c Departments of Neurosurgery, Children’s Medical Center of Dallas and University of Texas Southwestern Medical Center, Dallas, TX
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FIG 1. Case 1. Nonenhanced sagittal T1-weighted image (460/11/2 [TR/TE/NEX]). A solid-appearing nodule projects into the prepontine cistern on the right (curved arrow). The nodule is isointense relative to cortex. No enhancement is present after contrast medium administration (not shown).
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FIG 2. Case 2. Pre- (A and B) and postnatal (C) MR images.
A and B, Sagittal and coronal single-shot rapid acquisition SE images ( /60–80). A mass isointense relative to cortex is present within the suprasellar cistern (curved arrow). High-signal-intensity fluid-filled cysts project superiorly and posteriorly (arrows). There is elevation of the floor of the third ventricle and compression of the midbrain and pons.
C, Nonenhanced sagittal T1-weighted image (450/11/2). The nodule is isointense relative to cortex and lies in the suprasellar cistern (curved arrow). Associated fluid-filled cysts are of high signal intensity (arrows). No enhancement is present after contrast medium administration (not shown).
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