Core biopsy fragments totally effaced by a severe, chronic inflammatory process. There is numerous well-formed, non-necrotizing granulomas composed of cohesive clusters of plump epithelioid histiocytes. These granulomatous nodules are deeply embedded within a dense, reactive background infiltrate consisting predominantly of mature lymphocytes and plasma cells, which occasionally organize into distinct lymphoid aggregates. There is no evidence of a biphasic epithelial and myoepithelial proliferation, chondromyxoid stroma, or cellular atypia; no features of pleomorphic adenoma or malignancy are identified.
3x2 cm solid, hypoechoic nodule in the right submandibular gland with associated non-specific cervical lymphadenitis, highly suspicious for a pleomorphic adenoma.
Tissue cores up to 1.5 cm, totally embedded.
Right submandibular gland, core needle biopsy:
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