WHO fifth-edition update: imaging rare benign salivary gland tumors, Part I

Updated WHO salivary gland tumor classification now lists 15 benign epithelial types and adds four new benign entities; Part I reviews imaging of six rare benign tumors to sharpen radiologic-pathologic recognition.

• WHO fifth edition (online 2022, Blue Book 2024) categorizes 15 benign and 21 malignant epithelial salivary gland tumor types.
• Four new benign entities were added: intercalated duct adenoma/hyperplasia, striated duct adenoma, sclerosing polycystic adenoma, and keratocystoma.
• Part I details imaging criteria for cystadenoma, canalicular adenoma, sialadenoma papilliferum, ductal papillomas, sebaceous adenoma, and lymphadenoma.

Automated summary

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