Immunoblot analysis of ferritin light chain (FLC), ferritin heavy chain (FHC), and haptoglobin. Western blot is representative of three fine-needle aspiration (FNA) profiles of anaplastic (n = 3) and normal (n = 3) samples analyzed in triplicate and of the Riedel's thyroiditis (RT) FNA performed in triplicate (B). Densitometry of the blots is shown in (A). Statistically significant differences were observed between anaplastic and both normal (P < 0.05) and RT (P < 0.05) samples. No statistically significant differences were observed between normal and RT samples. (C) The table shows the mass spectrometry parameters for the proteins identified.