For instance, by simultaneously screening NapsinA and TTF‐1 in M1 and M2, which serve as subtype‐specific indicators to ascertain the origin of BrMs in patients with LC, we observed a significant correlation with lysophosphatidylcholine acyltransferase 1 (LPCAT1) (Figure S8, Supporting Information). Here, TTF1 is linked to laryngotracheoesophageal cleft.