What is true rossette and what is pseudorossette ? Give examples.

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A rosette is a cell formation in a halo or spoke-and-wheel arrangement, surrounding a central core or hub. The central hub may consist of an empty-appearing lumen or a space filled with cytoplasmic processes. The cytoplasm of each of the cells in the rosette is often wedge-shaped with the apex directed toward the central core: the nuclei of the cells participating in the rosette are peripherally positioned and form a ring or halo around the hub.
True rosette - has radial arrangement of cells around central area formed by basement of the cells .eg Retinoblastoma Flexner Weintersteiner rosettes. Pseudorosettes has radial arrangement of cells around central neuropil. eg Homer Wright rosettes Neuroblastoma PNET