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Washington University Experience | NEOPLASMS (NON-GLIAL NON-NEURONAL) | Choroid plexus papilloma | 2B6 Choroid Plexus Papilloma (Case 2) H&E nl choroid & CPP 1 copy
Compare the epithelium of the CPP (arrowhead) to the adjacent fragment of the normal choroid plexus with its knobbly surface epithelium (arrow). The overall findings are consistent with a choroid plexus papilloma (WHO grade I). ---- Immunohistochemistry with a Ki-67 immunostain shows a minimally increased proliferation index (up to 0.9%).
