what is Atypical lymphoplasmacytic infiltrate?

Atypical lymphoplasmacytic infiltrate refers to an abnormal accumulation of lymphocytes and plasma cells within a tissue, often observed in various pathological conditions, including certain hematological malignancies. This infiltrate can indicate a response to chronic inflammation or infection but may also be associated with conditions like Waldenström's macroglobulinemia. The term "atypical" suggests that the infiltrate shows unusual characteristics that may warrant further investigation to determine the underlying cause. Diagnosis typically requires histopathological examination and additional clinical context.