Table 1.

Milan System for Reporting Salivary Gland Cytology (adapted from [36]).

Category significance
Category I => Nondiagnostic, harboring a ROM of 25%
Category II => Nonneoplastic, harboring a ROM of 10%
Category III => Atypia of undetermined significance, harboring an estimated ROM of 20%
Category IV => Neoplasm
Subcategory IVA => Benign, harboring a ROM of <5%
Subcategory IVB => Salivary gland neoplasm of uncertain malignant potential, harboring a ROM of 35%
Category V => Suspicious for malignancy, harboring a ROM of 60%
Category VI => Malignant, harboring a ROM of 90%

Notes: ROM, risk of malignancy.