Table 2. Comparison of pathological characteristics between SR-SNUC and SD-SNUC.
| Variable | SR-SNUC | SD-SNUC | p -Value |
|---|---|---|---|
| Primary site | |||
| PNS alone | 04 | 06 | 0.08 |
| Both nasal cavity and PNS | 04 | 00 | |
| Laterality | |||
| Unilateral | 03 | 04 | 0.59 |
| Bilateral | 05 | 02 | |
| Orbital involvement | |||
| Present | 07 | 06 | 1.000 |
| Absent | 01 | 00 | |
| Skull base involvement | |||
| Present | 05 | 06 | 0.2 |
| Absent | 03 | 00 | |
| T stage | |||
| T3 | 01 | 00 | 1.000 1.000 (including UK) |
| T4a | 04 | 04 | |
| T4b | 02 | 02 | |
| UK | 01 | 00 | |
| N stage | |||
| N 0 | 06 | 05 | 1.000 0.99 (Including UK) |
| N 2 | 01 | 01 | |
| Unknown | 01 | 00 | |
| M stage | |||
| M 0 | 01 | 01 | 1.000 0.99 (Including UK) |
| M 1 | 06 | 05 | |
| UK | 01 | 00 | |
| Overall TNM stage | |||
| Stage III | 01 | 00 | 1.000 1.000 (including UK) |
| Stage IVA | 03 | 03 | |
| Stage IVB | 02 | 02 | |
| UK | 02 | 01 | |
| Growth pattern | |||
| Trabecular | 05 | 04 | 0.74 |
| Sheet-like | 03 | 01 | |
| Papillary | 00 | 01 | |
| Cytomorphology | |||
| Basaloid | 04 | 02 | 1.000 |
| Squamoid | 02 | 02 | |
| Plasmacytoid/rhabdoid | 02 | 02 | |
| Necrosis | |||
| Absent | 00 | 02 | 0.3 |
| Focal | 05 | 03 | |
| Diffuse | 03 | 01 | |
| Mitotic count | |||
| Mean | 26.50 | 22.17 | 0.6 |
| Standard deviation | 16.87 | 11.67 | |
Abbreviations: PNS, paranasal sinus; SD-SNUC, SMARCB1 -deficient sinonasal undifferentiated carcinoma; SR-SNUC, SMARCB1 -retained SNUC; TNM, tumor node metastasis; UK, unknown.