Correlation of histopathologic and MR imaging features of 23 sinonasal melanomasa
| T1-SP (+) | T1-SP (−) | P Valueb | |
|---|---|---|---|
| Melanin | .915 | ||
| Melanotic | 14 | 4 | .043c |
| Abundant | 9 | 0 | |
| Moderate | 5 | 3 | |
| Amelanotic | 4 | 1 | |
| Hemorrhage | .280 | ||
| Present | 12 | 2 | |
| Absent | 6 | 3 | |
| Cell type | .399 | ||
| Epithelioid | 12 | 3 | |
| Spindle | 3 | 0 | |
| Mixed | 3 | 2 |
Note:—+ indicates presence; −, absence.
↵a Data are presented as numbers of tumors.
↵b Comparison of the prevalence of a T1-SP according to the presence of melanin, the presence of hemorrhage, and the different cell types using the χ2 test.
↵c Comparison of the prevalence of a T1-SP between tumors with abundant melanin and the group of tumors with no and moderate melanin by the χ2 test.