Abstract
A new atomic force microscopy (AFM) method was used to examine 51 cytology specimens from breast and thyroid tumors and pretumors and 17 uterine cervix scrapes. The authors formulated the main tasks of using AFM in oncocytology: to search for objective criteria for differential diagnosis between intact and cancer cells; to identify viral changes in the squamatous epithelial cells; and to objectify the immunocytochemical reaction of Her-2/neu oncoprotein hyperexpression. The studies have revealed as follows: glandular cancers are characterized by an increased nucleus/cytoplasm height ratio (from 1.8 to 2.5 for breast cancer and from 1.9 to 2.5 for thyroid cancer); the squamatous epithelial cells show an inverse trend (a decrease from 2.96 to 2.08 for keratinizing carcinoma of the cervix uteri); viral squamatous cell lesion appears as a perinuclear groove 200 nm in depth; Her-2/neu oncoprotein hyperexpression corresponds to the increase in cytoplasmic height from 248 to 850 nm.
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