TPO and Hashimoto thyroiditis: Singh et al. analyze the cytomorphologic spectrum of Hashimoto's thyroiditis on FNAC and correlate cytologic findings with serologic parameters though they observed that grading of thyroiditis and lymphocytic infiltration showed no correlation with the clinical severity of the disease, but a high lymphoid : epithelial ratio was strongly correlated with thyroid peroxidase positivity and thyroid peroxidase positivity is statistically strongly associated with HT as compared to HT coexisting with follicular hyperplasia/Hashitoxicosis/neoplasm [10].