Table 1:

Visualization of a T1-SP on MR imaging in sinonasal melanomas and nonmelanomatous malignant sinonasal tumors based on consensus readinga

TotalHyperintense Foci on T1WI
PresentAbsent
T1-SP (+)T1-SP (−)
Sinonasal melanomab312344
Nonmelanomatous malignant tumorb10631984
    Squamous cell carcinoma452637
    Lymphoma221219
    Adenoid cystic carcinoma10046
    Rhabdomyosarcoma5005
    Neuroendocrine carcinoma4022
    Adenocarcinoma4022
    Malignant fibrous histiocytoma3012
    Poorly differentiated carcinoma3003
    Spindle cell sarcoma3003
    Esthesioneuroblastoma1001
    Small round cell sarcoma1010
    Inflammatory myofibroblastic sarcoma1001
    Malignant peripheral nerve sheath tumor1001
    Ewing sarcoma1010
    Chondrosarcoma1001
    Myoepithelial carcinoma1001

  • Note:—+ indicates presence; −, absence.

  • ↵a Data are presented as number of tumors.

  • ↵b P value < .001 by the Fisher exact test.