| • Inflammatory (mumps, ascending sialadenitis, recurrent juvenile parotitis, HIV sialadenitis, other infections such as tuberculosis, Sjogren's syndrome, sarcoidosis) | • Neoplasms |
| • Cystic fibrosis | • Duct obstruction |
| • Sialosis | |
| • Drugs (such as protease inhibitors) | |
| • Deposits (such as amyloid) | |