DPPA2 and non-small cell lung carcinoma: The expression of Embryo-cancer sequence A (ECSA), also named developmental pluripotency associated-2 (DPPA2), is limited to normal testis, placenta, bone marrow, thymus, and kidney, but it is expressed in a variety of tumors, most notably in 30% of non-small cell lung cancers (NSCLC) [229].