PMC4277240_01
MRI scans of the head (A-E) and frozen section image (F).. Notes: (A and B) Axial plain MRI scan demonstrates a round mass about 2.6x2.1x1.6 cm3 in the right cerebellar hemisphere. (C-E) Contrast-enhanced MRI scan shows that the right cerebellar mass was enhanced as nodular with a thick and annular wall. (F) Within the tissue frozen section, a large number of mononuclear cells and multinucleated giant cells are diffusely seen. There is a small amount of bacteria circular structure and mesenchyme hyalinization, with a large amount of lymphocyte and little plasma cell infiltration and local tissue necrosis with neutrophils infiltration. Immunohistochemical staining: thallus PAS (+).. Abbreviations: MRI, magnetic resonance imaging; PAS, periodic acid-schiff stain.
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T2 signal in the right cerebellar hemisphere with no adjacent edema, and the nodule was significantly enhanced as nodular with a thick and annular wall after contrast administration (Figure 1C-E). There was no midline shift, and the compression of adjacent structures was not apparent (Figure 1A and B). The patient was considered to have a metastatic tumor or glioma in the right cerebellar hemisphere. There was a small amount of bacteria circular structure and mesenchyme hyalinization, with a large number of lymphocytes and a few plasma cell infiltrations; local tissue necrosis with neutrophil infiltration was also found in the frozen section tissues (Figure 1F).