p53 Immunohistochemistry Patterns Are Surrogate Biomarkers for TP53 Mutations in Gastrointestinal Neuroendocrine Neoplasms

Table 4

Comparison of p53 IHC staining patterns among NET and NEC cases.

IHC patterns	NETs, no. (%)	NECs, no. (%)	value
Pattern A	2 (5.7)	11 (19.3)	<0.001
Pattern B	31 (88.6)	4 (7.0)
Pattern C1	0	6 (10.5)
Pattern C2	2 (5.7)	36 (63.2)