“…4,10,13,14 The perivascular pseudorosettes are inconspicuous and ependymal rosettes typically absent. 1,3,4,10,11,[13][14][15] As the light microscopy picture is similar to astrocytoma, tanycytic ependymoma is often misinterpreted as being piloid astrocytoma, 1,3,4,10,11,13,14,16 however, the EM characteristics are confirmed as ependymal. 1,4,10,11 Despite tanycyte concentration being highest in the third ventricle, tanycytic ependymomas demonstrate a propensity for the spinal cord, 1,3,4,8,11 in keeping with other ependymomas.…”