Pleomorphic adenoma with extensive squamous metaplasia and keratinizing cysts: Diagnostic and clinical pitfalls - A report of two cases and review of literature.

Pleomorphic adenoma is the most common benign tumour of major or minor salivary glands. Histological diversity is the hallmark of pleomorphic adenoma. Extensive squamous metaplasia with keratin-filled cysts is rarely reported. Here we present two cases of pleomorphic adenoma with exuberant squamous metaplasia and keratin filled cysts formation in a minor salivary gland and discuss its potential diagnostic pitfalls.