PMC10406508_01
Preoperative enhanced T1-weighted MRI scan showing an enlarged pituitary stalk. (A) Coronal and (B) sagittal images showing that the tumor and the normal pituitary gland are bounded by the diaphragma sellae. The tumor size is about 12 x 15 x 16 mm.
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T1- and T2-weighted images, and homogeneous contrast enhancement was observed (Figure 1). The lesion size was about 12 x 15 x 16 mm.
During the operation, we saw that the enlarged pituitary stalk had an abundant blood supply (arrow).
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This showed that the pituitary stalk had grown expansively and the blood supply was abundant (Figure 2).
Histology and immunohistochemical staining of tumor. (A) H&E staining, x400. (B) Substantial CD20-positive B lymphocytes (arrow shows that the cell membrane of a CD20-positive B lymphocyte is tan).
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The pathological diagnosis was extranodal MALT of the sellar region, which is an MZL (Figure 3).
MRI scans of the tumor in the sellar region involving the pituitary stalk. (A) Before and (B) 3 months after partial resection.
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At the follow-up 3 months later, a pituitary MRI showed that the tumor did not grow after surgery (Figure 4; the patient and his family selected only unenhanced MRI).