Extranodal lymphomas can be challenging for a practicing cytopathologist, especially in the fine needle aspiration clinic setting. These lymphomas can vary in type from one extranodal site to another. A variety of these lymphomas have very specific clinicopathologic features. They also may be associated with underlying autoimmune diseases, immunodeficiency syndromes, infection, or be noted in unique ethnic communities. This article reviews some of the commonly encountered lymphomas in extranodal sites with an emphasis on clinicopathologic and cytologic features.
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