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Figure 1: (a) MRI T1W sagittal with lesion in sella. (b) T1W with contrast enhancement of lesion and adjacent dura. (c) T1W coronal with contrast lesion extending up to optic chiasma. (d) T1W with contrast (Follow up) with residual enhancement of pituitary stalk. (e) Photomicrograph showing destruction of pituitary gland by lymphoplasmacytic cells (H&E, x40). (f) Toluidine blue showing increased mast cells. (Toluidine blue stain, x40)

Figure 1: (a) MRI T1W sagittal with lesion in sella. (b) T1W with contrast enhancement of lesion and adjacent dura. (c) T1W coronal with contrast lesion extending up to optic chiasma. (d) T1W with contrast (Follow up) with residual enhancement of pituitary stalk. (e) Photomicrograph showing destruction of pituitary gland by lymphoplasmacytic cells (H&E, x40). (f) Toluidine blue showing increased mast cells. (Toluidine blue stain, x40)