Figure 1

This is a low power view of a H&E stained slide showing normal parotid gland (salivary tissue) with serous acini in the upper half of the field adjacent to multi-loculated lesional tissue with cystic spaces lined by lymphoid tissue in which there is florid lymphoid hyperplasia with prominent germinal centres. The lumen of the cyst on the right contains haemorrhagic and keratinous debris including inflammatory cells and cholesterol clefts. The Inset (top right corner) is a medium power view of a H&E stained slide showing the epithelium lining the cyst wall which is mostly flattened squamous in type, showing the close relationship with the lymphoid stroma, as well as focal infiltration of lymphocytes into the epithelium.