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AJNR - American Journal of Neuroradiology

Published ahead of print on May 22, 2008
doi: 10.3174/ajnr.A1117

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Enlargement of the Proximal Pituitary Stalk Associated with Spontaneous Recovery from Multiple Pituitary Hormone Deficiencies

F. Berkowitz^a, P.J. Lee^a, A.L. Martin^b and M.M. Martin^b

^a Department of Radiology, Georgetown University Hospital, Washington, DC
^b Department of Pediatrics, Georgetown University Hospital, Washington, DC

View larger version (76K): [in this window] [in a new window]   Fig 1. Sagittal unenhanced (A) and contrast-enhanced (B) T1-weighted (TR, 600 ms; TE, 15 ms) MR images in our patient at age 5 years show a slightly thickened proximal stalk (thick arrow) and a threadlike distal stalk. Ectopic posterior pituitary hyperintense signal intensity (thin arrow) is located at the median eminence. The adenohypophysis and sella turcica are small. The apparent lack of enhancement of the proximal stalk (B) is from a delay in imaging after the contrast injection. Coronal images (not shown), which were obtained before the sagittal images, demonstrated enhancement.

View larger version (89K): [in this window] [in a new window]   Fig 2. Sagittal unenhanced (A) and contrast-enhanced (B) T1-weighted (TR, 600 ms; TE, 15 ms) MR images in our patient at age 19 years show a markedly enlarged proximal stalk (thick arrow) and a thin distal stalk. Ectopic posterior pituitary hyperintense signal intensity (thin arrow) is seen at the median eminence on the unenhanced images but is obscured by contrast on the enhanced images. The adenohypophysis and sella turcica remain small.