Histological findings (cases no. 1 and 2). (A) Case no. 1: High-grade T-cell lymphoma, large cell predominance; proliferation of large lymphoid cells with immunoblasts (arrow) and medium-sized cells with plasmacytic differentiation (double arrow). Notice the discrete nuclear pleomorphism (hematoxylin-eosin, original magnification × 1,320). (B) Case no. 2: High grade pleomorphic T-cell lymphoma, medium-sized and large cell predominance. Proliferation of lymphoid cells with irregularly indented nuclei of various size and small nucleoli looking like a pleomorphic T-cell lymphoma with predominance of medium cells (hematoxylin-eosin, original magnification × 1,320).