 Unfortunately, perivascular pseudorosettes are also less specific in that they are also encountered in medulloblastomas, PNETs, central neurocytomas,
and less often in glioblastomas, and a rare pediatric tumor, monomorphous pilomyxoid astrocytomas.Histologic features of these two tumors are virtually identical, including their tendency to form neuropilrich rosettes, referred to as pineocytomatous/neurocytic rosettes in central neurocytoma.Both are quite similar to the Homer Wright rosette, but they are generally larger and more irregular in contour.