Fig. 2

a Mature epidermis, cutaneous appendages, and adipose tissues in the tumor tissues; b neuroectodermal tissues and mesenchyme at local regions of the tumor; c (magnified figure of b): mature CNS tissues including neurons, glial cells, and ependymal tubules; d (magnified figure of b​) the mesenchyme tissues are immature cartilages (the immature cartilages are only found here); e mature bone tissues among the neurocytoma tissues; f clear boundaries with the surrounding neuroectodermal tissues; g neuropil-like islands formed by the tumor cells; and H: densely arranged uniform round cells with perinuclear halos with oligodendroglioma-like honeycomb appearance. a and b are at low magnification, c-g are at moderate magnification, and h is at high magnification