label: In Situ Follicular Neoplasia
label_lc: in situ follicular neoplasia
description: A follicular neoplasia confined to the germinal centers of the lymph nodes, without evidence of disseminated disease. It is characterized by the replacement of a germinal center by neoplastic centrocytes with uniformly intense positivity for BCL2. The surrounding mantle cuff and lymphoid architecture are intact. It has a low rate of progression to follicular lymphoma, but is often associated with prior or synchronous overt lymphoma.