Quantification of selected elements in ovarian tumours and their potentials as a tissue classifier.

Neoplastic and healthy ovarian tissues were analysed to identify the changes in the spatial distribution and concentration of elements using synchrotron induced micro X-ray fluorescence spectroscopy. High-resolution distribution maps of minor and trace elements were drawn. Significant amounts of elements such as P, S, Cl, K, Ca, Fe, Cu, Zn, Br and Rb were present in all neoplastic tissues analysed. The study showed significant diversifications in elemental distributions depending on the structure of tissue. The efficacy of micro X-ray fluorescence spectroscopy to distinguish between various types of ovarian tumours based on the concentrations of studied elements was confirmed by multivariate discriminant analysis. Our analysis showed that the most important elements for tissue classification are S, Cl, K, Fe, Zn, Br and Rb.