“…37,60,[73][74][75] Abnormalities of the chromatin pattern, such as chromatin clumping, irregularities of the nuclear membrane and nuclear molding, as well as increased nuclear to cytoplasmic ratio (N:C), loss of cellular orientation and formation of small, 3-D epithelial clusters with marked atypia have been described as major criteria of malignancy (Figure 1). 1,60,[69][70][71] Among these, chromatin clumping seems to be of the greatest predictive value. 1,60 Other features such as increased nuclear size, nuclear pleomorphism, irregular nuclear contours and nuclear grooves or macronucleoli are generally considered of minor significance and not specific enough to establish on their own a positive indication for malignancy diagnosis.…”