KROK 1 Stomatology 2012 – Question 131 · KROK (Dentistry)
A 67-year-old patient underwent extraction of a tumour of the right parotid region. Macroscopical examination revealed a soft encapsulated node up to 3,5 cm in diameter, the tissue was whitish-grey and included many small cysts. Microscopical examination revealed that the duct structures of large diameter were lined with bilayer prismatic epithelium, they had eosinophilic cytoplasm, the duct lumens contained papillary structures, the stroma was infiltrated with lymphocytes, there were some solitary lymphoid follicles. Specify the kind of tumour:
- A. Monomorphic carcinoma
- B. Mucoepidermal tumour
- C. Adenocystic carcinoma
- D. Pleomorphic adenoma
- E. Adenolymphoma
Hint
Focus on the combination of cystic spaces lined by a double layer of eosinophilic (oncocytic) epithelium and a lymphoid stroma with follicles in the parotid of an elderly patient.
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