Table 2.
Demographic features and conventional MRI findings of tumor subgroups
| Tumors | Benign (n:48) | Malign (n:12) | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| PA | WA | BCA | Cyst | Lipoma | BC | Adeno | SCC | FL | Total | ||
| Number of cases | 15 | 25 | 1 | 1 | 1 | 5 | 3 | 5 | 4 | 60 | |
| Agea | 55 | 57 | 52 | 34 | 77 | 70 | 60 | 64 | 70 | 59 | |
| Gender (M/F) | 7/8 | 17/8 | F | M | M | 4/1 | M | 2/3 | M | 39/21 | |
| Size (mm)a | 25 | 26 | 18 | 28 | 33 | 21 | 27 | 24 | 38 | 26 | |
| Location | Right | 7 (%46) | 7 (%28) | 1 | – | – | 2 (%40) | 3 (%100) | 5 (%100) | 1 (%25) | 26 (%43) |
| Left | 8 (%54) | 12 (%48) | – | 1 | 1 | 3 (%60) | – | – | 2 (%50) | 27 (%45) | |
| Bilateral | – | 6 (%24) | – | – | – | – | – | – | 1 (%25) | 7 (%12) | |
| Contour | Smooth | 6 (%40) | 4 (%16) | – | – | – | 4 (%80) | 1 (%33) | 1 (%20) | – | 16 (%26) |
| Lobulated | 8 (%53) | 19 (%76) | 1 | 1 | 1 | 1 (%20) | – | 3 (%60) | 3 (%75) | 37 (%62) | |
| Irregular | 1 (%7) | 2 (%8) | – | – | – | – | 2 (%67) | 1 (%20) | 1 (%25) | 7 (%12) | |
| Border | Circumscribed | 14 (%93) | 24 (%96) | 1 | 1 | 1 | 5 (%100) | 1 (%33) | 4 (%80) | 3 (%75) | 54 (%90) |
| Irregular | 1 (%7) | 1 (%4) | – | – | – | – | 2 (%67) | 1 (%20) | 1 (%25) | 9 (%10) | |
Adeno, adenocarcinoma; BC, benign cytology; BCA, basal cell adenoma; Cyst, lymphoepithelial cyst; FL, follicular lymphoma; PA, pleomorphic adenoma; SCC, squamous cell carcinoma; WA, Warthin tumor.
a
If the number of tumors is more than one, it is given as a mean.