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Washington University Experience | NEOPLASMS (MENINGIOMA) | Chordoid | 4F Meningioma, chordoid (Case 4) Ki67 2.jpg
A Ki-67 immunostain demonstrates an index of proliferation elevated to 6.7%. ---- Given the distinctive histomorphologic and histochemical features, this tumor is best characterized as a chordoid meningioma, WHO grade II.
