DLL3 and neuroendocrine carcinoma: DLL3 expression was detected in 55 of 78 GEP NEC samples overall (71%; median IHC H-score, 47.5; IQR, 0-160; range, 0-300); breakdowns by GEP NEC subtype and by DLL3-positive cases only are displayed in Figures 1A and 1B and Table 1.