PMC5013220_01
(a) 2.4 x 2.2 cm enhancing sellar lesion, coronal section. (b) A sagittal section of the same sellar mass with a 1.5 cm tertiary dimension.
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fig1
The MRI displayed features suggestive of an inflammatory process; however, a pituitary macroadenoma could not be completely ruled out (Figures 1(a) and 1(b)).
(a) A low magnification view of the sellar region showing multiple granulomas composed of histiocytes surrounded by lymphoplasmacystic infiltrates, 100x. (b) A higher magnification view of the granulomatous inflammation, 400x. (c) CD163 immunohistochemical stain highlighting the histiocytes within the granulomas, 400x. (d) Trichrome histochemical stain highlighting background fibrosis in blue, 400x.
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Trichrome histochemical stain highlighted the increased fibrosis in the background (Figures 2(a)-2(d)).