Category 4b cases were those, where a specific neoplastic entity cannot be made, and out of 6 cases, 1 case was reclassified as granulomatous sialadenitis, 3 cases as PA, and 1 case as AdCC and MEC each.
Overall, ROM reported was 33.3% in this category..
The Milan System for Reporting Salivary Gland Cytopathology (MSRSGC) is a six-tiered system for standardizing diagnoses and improvement of communication between pathologists and clinicians, providing risk of malignancy (ROM) rates for every category.Apr 16, 2023.
Normal salivary gland FNA cytology comprises of acinar cells, ductal cells and admixed adipose tissue.
Sometimes, normal lymphoid tissue may present due to aspiration of intraparotid or periparotid lymph nodes.
Acinar cells could be serous type and/or mucinous types depending on which salivary glands were aspirated..
The six categories of Milan system were as follows – Category I (Non-diagnostic), Category II (Non-neoplastic), Category III (Atypia of Undetermined Significance [AUS]), Category IVa (benign), Category IVb (Salivary gland neoplasm of Uncertain Malignant Potential [SUMP]), Category V (Suspicious for Malignancy [SFM]), May 6, 2021.
11, 12, 13 The six categories as per this system are Non diagnostic(ND), Non neoplastic(N), Atypia of undetermined malignancy(AUS), Neoplasm-Benign (NB),Neoplasm-Suspicious of malignant potential(SUMP), Suspicious of malignancy(SM), and Malignant..
