FOS expression in PRE, POST and tissue specimens of breast cancers. (A) The expression levels of two FOS probes in microarray data of PRE and POST FNAB from 16 cases of invasive breast cancers, and tissue specimens from 10 invasive breast cancers. (B) FOS expression changes among the different specimens for array probe 1 (PRE vs. POST, P = 0.002 and PRE vs. tissue, P = 0.000023) and array probe 2 (PRE vs. POST, P = 0.006 and PRE vs. tissue, P = 0.000071). (C) Comparison of FOS expression levels between microarrays and qRT-PCR data for tissue specimens of breast cancers. The correlation coefficients between FOS expression level detected by qRT-PCR and two array data for tissue specimens are 0.86 (P = 0.0015) and 0.79 (P = 0.0063).