SACK1B and thyroid gland undifferentiated (anaplastic) carcinoma: Since a huge FAM83B expression variability was observed in TC group, we decided to analyze separately the 34 tumors with different tumor histotypes as follows: 5 follicular thyroid cancers (FTC), 20 papillary thyroid cancers (PTC), and 9 poorly differentiated/anaplastic thyroid cancers (PDTC/ATC).