ABSTRACT
A 61-year-old female patient presented a nodular lesion located in the right buccal mucosa with a 3-month evolution. Clinical hypotheses of salivary duct cyst and mucocele were proposed, and the patient underwent excisional biopsy. Microscopically, a well-circumscribed and encapsulated lymphoid aggregate fragment was observed, characterized by layers of well-differentiated small lymphocytes and collections of reactive lymphoblasts. These findings, associated with immunohistochemistry, established the diagnosis of follicular lymphoid hyperplasia. Currently, the patient is well, under follow-up after six months.
Key words:
lymphoid tissue; pseudolymphoma; diagnosis differential; lymphoma; oral medicine