TP53 and small cell lung carcinoma: Interestingly, 23 of the 75 hub genes from CD56+ CTC, such as ERBB2, TP53, CREBBP and NF1, were found enriched in at least 1 of the 3 queried databases, illustrating the high affinity of the liquid biopsies to recapitulate the molecular genomic landscape of small cell lung cancer.