Grading of Neuroendocrine Carcinomas: Correlation of ⁶⁸Ga-PET/CT Scan with Tissue Biomarkers

Table 2

Immunohistochemical expression of ATRX, DAXX, and RB1.

	Total (%)	Pancreatic (%)	GI (%)
ATRX
Positive	6 (66.7)	3 (100.0)	3 (50.0)
Negative	3 (33.3)	0 (0.0)	3 (50.0)
Not evaluated	2	2	—
DAXX
Positive	9 (100)	3 (100.0)	6 (100.0)
Negative	0 (0)	0 (0.0)	0 (0.0)
Not evaluated	2	2	—
ATRX + DAXX
Positive	6 (66.7)	3 (100.0)	3 (50.0)
Negative	3 (33.3)	0 (0.0)	3 (50.0)
Not evaluated	2	2	—
RB1
Positive	4 (44.5)	2 (66.7)	2 (33.3)
Negative	5 (55.5)	1 (33.3)	4 (66.7)
Not evaluated	2	2	—

GI: gastrointestinal.