Fig. 2

Histomorphology of the tumor indicated A diffuse infiltration of large lymphoid cells and destruction of brain tissue. No lymphoid follicular structure was observed. B Medium-to-large lymphoid cells are distributed around blood vessels in a ring-like arrangement. C Under the high magnification, the tumor cells were round or oval, with a clear nuclear membrane, vacuolated, close to 1 to 3 nucleoli near the nuclear membrane, and pathological mitotic figures can be seen