Table 1.

Clinical, histologic, and immunophenotypic findings of sinonasal malignant mucosal melanomas

Case	Age	Sex	Site	Melanin pigment	UTSW S100 protein (H-score)	Reference Lab S100 protein (H-score)	SOX10 (H-score)
1	74	F	Nasal cavity	Focal	10	10	300
2	67	M	Nasal cavity, skull base	Diffuse	100	N/A	300
3	60	M	Nasal cavity	Focal	160	N/A	300
4	61	F	Nasal cavity	None	300	N/A	300
5	68	M	Nasal cavity	None	2	0	300
6	80	F	Nasal cavity	None	300	N/A	300
7	81	F	Maxillary sinus	None	0	80	300
8	82	M	Nasal cavity, skull base	Focal	0	0	300
9	74	M	Nasal cavity, skull base	Focal	0	1	300
10	42	M	Maxillary sinus	Diffuse	300	N/A	300
11	48	M	Nasal cavity	None	40	30	300
12	67	M	Nasal cavity	Focal	300	N/A	300
13	56	M	Nasal cavity	Focal	30	30	300
14	90	M	Nasal cavity	Focal	160	N/A	300
15	84	F	Ethmoid sinus, skull base	Focal	2	0	300
16	45	M	Maxillary sinus	Focal	200	N/A	300
17	64	F	Nasal cavity, skull base	None	300	N/A	300
18	51	F	Nasal cavity	None	0	0	300
19	82	F	Sphenoid sinus	None	300	N/A	300
20	36	F	Maxillary sinus	None	140	N/A	300
21	58	M	Nasal cavity, ethmoid sinus	Focal	140	N/A	300
22	80	M	Nasal cavity	None	0	0	300
23	44	M	Nasal cavity	Focal	40	N/A	210

F female, M male, UTSW University of Texas Southwestern, H-score intensity × extent of staining, N/A not applicable