FADS2 and neoplasm: A negative correlation was found between the expression of FADS2 in the growing tumor area and the expression of FADS3 in the peritumoral area; a positive correlation between FADS2 expression in the necrotic core and SCD in the peritumoral area; and a positive correlation between FADS2 expression in the peritumoral area and SCD5 expression in the necrotic core.