DLL3 expression‐positive LCNEC (type I LCNEC suspected) includes a large proportion of triple‐positive LCNEC, while DLL3 expression‐negative LCNEC (type II LCNEC suspected) mainly includes non‐triple‐positive LCNEC, suggesting a strong correlation between these two classifications. Here, DLL3 is linked to large cell neuroendocrine carcinoma.