Histology
MACROSCOPIC DESCRIPTION:
Parapharyngeal mass and parotid margins: Multiple rubbery, yellow tan tissue fragments, in aggregate 50x40x15mm.
MICROSCOPIC DESCRIPTION:
Sections show multiple fragments of parotid tissue and tumour. Parapharyngeal tissue has a bimorphic morphology with prominent areas of chondromyxoid stroma. Embedded within this chondromyxoid stroma there is an epithelial component which has ductular structures with bland small round nuclei. No evidence of significant nuclear pleomorphism is seen. No evidence of necrosis is present.
DIAGNOSIS:
Parapharyngeal mass: Features in keeping with a pleomorphic adenoma. No overt malignant features are seen.