Histology
MACROSCOPIC DESCRIPTION:
Left parotid: A parotid with two orienting sutures, a short presumed anterior and long presumed medial. The specimen measures superior to inferior 60mm, medial to lateral 30mm and anterior to posterior 30mm. There is a firm lobulated tumour measuring at least 35mm in maximum dimension. The tumour has a gristly cut surface and is pale white.
MICROSCOPIC DESCRIPTION:
Parotid gland: The sections show parotid tissue in which an encapsulated pleomorphic adenoma is seen. The tumour consists of epithelial and stromal components. The stromal component is dominant and includes myxoid, fibrous, chondroid and cartilaginous areas. No atypia of the stroma component is seen. The epithelial component is unevenly distributed but includes islands and cords of bland epithelioid cells in which squamous differentiation, keratin filled cysts and glandular structures are seen. Foci of plasmacytoid cells are seen. No significant cellular atypia is identified. Areas of dystrophic calcification are also seen. The capsule abuts multiple inked surgical margins.
DIAGNOSIS:
Left parotid: Pleomorphic adenoma with capsule abutting inked surgical margins