- Uniform plump columnar cells with bland nuclei with diverse growth patterns (tubular, cribriform, papillary, solid, fascicular, microcystic, single file, pseudoadenoid cystic [without true lumens], strand-like, mixed)
- Perineural invasion common around small nerves; infiltrative borders; up to 12 mitotic figures per 10 HPF; rare tumor necrosis
- S100, EMA, keratin, muscle specific actin and CEA (may be focal)
End of Oral cavity > Minor salivary gland tumors / lesions > Polymorphous low grade adenocarcinoma
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