A. Mucoepidermoid Carcinoma
B. Adenoid Cystic Carcinoma
C. Warthin’s Tumor
D. Pleomorphic Adenoma
Ans:A. Mucoepidermoid Carcinoma.
Image shows:This image shows a low grade component of this high grade neoplasm containing glands lined by goblet cells, squamous cells and intermediate cells as well as an oval squamous cell nest in the center.
- It is the most common malignant salivary gland tumour (both in the major and minor glands).
- The parotid gland amongst the major salivary glands and the minor salivary glands in the palate are the most common sites.
- Common age group affected is 30-60 years but it is also the most common malignant salivary gland tumour affecting children and adolescents.
- It is the most common example of radiation-induced malignant tumour, especially therapeutic radiation.
- Grossly, the tumour is usually circumscribed but not encapsulated. It varies in size from 1 to 4 cm.
- Microscopically, the tumour is classified into low, intermediate and high grade depending upon the degree of differentiation and tumour invasiveness.
- The tumour is composed of combination of 4 types of cells: mucin producing, squamous, intermediate and clear cells.
- Well differentiated tumours have predominance of mucinous cells, while poorly differentiated have more solid and infiltrative pattern.