MAGEA1 and cancer: CTCs also expressed cancer associated transcripts (BAGE, BAGE3, CT45A1, CT45A4, CT45A5, CT45A6, CTAG18, CTAG2, MAGEA12, MAGEA1, MAGEA3, MAGEA6, MAGEC1, MAGEC2, and PTTG1) and transcripts important in regulating development (HOXB7, HOXB8, HOXB9, NANOGNB, and LOC404266).