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The Krause operations.

Some of Fedor Krause's contributions to operative technique are reviewed and portrayed as fundamental steps in the progress of neurological surgery. The approaches he devised, the "Krause operations," are exposure of the trigeminal ganglion and root, of the cerebellopontine angle, and of the pituitary (transfrontal) and the pineal (supracerebellar) regions. This review recalls the significance of the aggregate body of Krause's work, which has not been fully appreciated except by his compatriots.