Table 1.

NKX2.2 immunohistochemistry in sinonasal neoplasms

Diagnosis	Positivity	Extent	Intensity
Ewing sarcoma	7/7 (100)	F0, D7	W2, S5
Teratocarcinosarcoma	5/6 (83)	F5, D0	W0, S5
Melanoma	4/6 (67)	F2, D2	W4, S0
Small cell carcinoma	1/2 (50)	F0, D1	W0, S1
Olfactory neuroblastoma	12/46 (26)	F0, D12	W10, S2
Squamous cell carcinoma	0/73 (0)	–	–
Sinonasal undifferentiated carcinoma (SNUC)	0/8 (0)	–	–
SMARCB1-deficient carcinoma	0/6 (0)	–	–
Alveolar rhabdomyosarcoma	0/5 (0)	–	–
Solid adenoid cystic carcinoma	0/4 (0)	–	–
NK/T cell lymphoma	0/4 (0)	–	–
NUT midline carcinoma	0/3 (0)	–	–

F focal, D diffuse, W weak, S strong