Intraoperative cytology of tumors

A quick staining method is described that permits a full cytologic statement on the seriousness of lesions within 3 min intraoperatively. The accuracy of this method of diagnosis and cytodiagnosis of benign and malignant tumors can be compared with histological examinations. The principal advantage is the speed compared with a cytologic fast-cut during operation. Moreover, the preparation or slide is of higher durability; the color and staining response have not faded for 10 yr, so far.