Fig. 4From: An unusual initial presentation of mantle cell lymphoma arising from the lymphoid stroma of warthin tumorImmunohistochemical stains demonstrate the neoplastic lymphoid cells positive for a CD20, b PAX5, c Cyclin D1, d CD5, weak, e and BCL2. The Ki67 proliferation index (F) was estimated at 40 %. Immunohistochemical stain, original magnification,400× (a–f)Back to article page