Acinic cell carcinoma of the salivary gland associated with lymphoid-rich stroma. A diagnostic dilemma on cytology: Study of two cases.

A lymphoid-rich stroma is a common finding in salivary gland tumors. Several reports documented this association with acinic cell carcinoma (ACC). However, cytologic studies reporting this phenomenon are rare and mainly confined to sporadic single case reports. We present the cytologic features of two cases of ACCs of the parotid gland displaying a lymphoid-rich background and discuss the cytologic differential diagnoses of this uncommon ACC variant.