Mantle Cell Lymphoma
Nodal involvement by mantle cell lymphoma can show three possible architectural patterns - mantle zone, nodular, or diffuse. This case had a predominant nodular pattern. Transitional areas between different patterns may be seen. When nodularity is prominent, it may be confused with follicular lymphoma at low magnification. Image courtesy of: Genevieve Crane, MD, PhD, Johns Hopkins Hospital, Baltimore, Maryland, USA.