PMC3496940_01
Post-contrast coronal T1-weighted image demonstrates pituitary macroadenoma (white narrow arrows) with extension into
suprasellar area. Incidental note is made of a hypersignal lesion in the left sphenoclival area (open arrow).
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Post-contrast sagittal T1weighted image, after 6 months, reveals marked decrease in size of the pituitary mass (white narrow arrow).
The clival lesion is also detected with lobulated; albeit, well-defined border (open arrow).
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Follow-up pituitary MR scan, at 6 months interval (Fig. 2) showed no tumoral growth in intraosseous lesion while the pituitary macroadenoma had remarkably decreased in size.
(A-D) Axial T1- (A), axial T2- (B) and fat-suppressed coronal T1- (C) weighted images, after 17 months, demonstrate high T1 and
T2 signal lesion within the clivus and left sphenoid wing which exhibits complete signal loss after applying fat suppression pulse (open arrow
in C). Some internal hyposignal septa (arrows in A & B) are also appreciated, possibly due to the residual trabeculation after bone resorption.
The lesion shows no enhancement in post contrast fat-suppressed T1-weighted image (open arrow in D).
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Performed axial CT scan depicts the fat attenuation of the sphenoclival mass (arrows) with associated internal ossified trabecular
septa. The expansion of left greater wing is shown to better advantage. The mean density of the lesion was between -50 and -100 Hounsfield
Unit.
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The patient also underwent brain CT (Fig. 4) and Hounsfield Unit measurements of the sphenoclival lesion, in CT exam were between -50 and -100, confirming the fatty nature of the tumor.