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Washington University Experience | NEOPLASMS (MENINGIOMA) | Chordoid | 15B Meningioma, chordoid (Case 15) PR 1.jpg
Tumor cells are diffusely and strongly positive for progesterone receptor. ---- Ancillary data (not shown): Ki-67 immunostain shows a low proliferation index of 0.9%. ---- Comment: The histological and immunohistochemical findings are diagnostic for chordoid meningioma, recurrent, WHO Grade 2.
