Table 2:
Mean ADC values of all histologically proved entities of parotid gland tumors (n = 136)*
| Diagnosis | Mean ADC values ± SD (95% CI) (× 10−3 mm2/s) |
|---|---|
| Pleomorphic adenoma (n = 43) | 2.09 ± 0.16 (2.03–2.14) |
| Warthin tumor (n = 32) | 0.89 ± 0.16 (0.82–0.96) |
| Myoepithelial adenoma (n = 6) | 1.86 ± 0.18 (1.83–1.91) |
| Lipoma (n = 3) | 0.62 ± 0.21 (0.54–0.76) |
| Basal cell adenoma (n = 1) | 1.23 |
| Cystadenoma (n = 1) | 2.29 |
| Inverted ductal papilloma (n = 1) | 1.99 |
| Mucoepidermoid carcinoma (n = 16) | 1.05 ± 0.03 (0.97–1.14) |
| Salivary duct carcinoma (n = 11) | 1.10 ± 0.09 (0.89–1.31) |
| Acinic cell carcinoma (n = 10) | 0.79 ± 0.33 (0.68–0.88) |
| Basal cell adenocarcinoma (n = 9) | 0.96 ± 0.29 (0.71–1.12) |
| Adenoid cystic carcinoma (n = 1) | 0.87 |
| Epithelial-myoepithelial carcinoma (n = 1) | 0.92 |
| Carcinoma ex pleomorphic adenoma (n = 1) | 1.14 |
Note:—CI indicates confidence interval; ADC, apparent diffusion coefficient.
*
In case of a single tumor, SD and 95% CI were not calculated.