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Perfusion fixation with glutaraldehyde for electronmicroscopy of human thyroid tumours.

A method has been worked out to perfuse a thyroid lobe containing a thyroid tumour immediately after it has been removed from the organism. The surgical technique and the fixation method are described. The preservation of the thyroid tissue that was achieved with the described method is of adequate quality and comparable with results obtained in experimental animals. The method has so far been used in 30 cases, of which 4 are represented by micrographs in this preliminary communication.