Short-Spindled Cell Haemangioblastoma with CD34 Expression: New Histopathological Variant or Just a Stochastic Cytological Singularity?

Figure 4

Extended immunohistochemistry panel. (a) CD34. Boundary zone with immunoreactive fusiform cells (right field) as well as nonreactive spindle cells (left field). Positive internal controls—endothelial cells—are identified in the latter. (b) CD34. Closer magnification of the spindle cell component carrying this antigen. (c) CD99. Expression of this marker was also confirmed. (d) FXIIIa. Immunolabeling confined to single cells (green arrow).

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