T-PLL is an aggressive T-cell leukemia composed of small to medium-sized post-thymic T-cells, which usually have a nucleolus (Up to 25% of cases may not have visible nucleoli).  Most patients will have generalized lymphadenopathy in addition to hepatosplenomegaly.  Up to 20% of cases will have skin involvement.

 

Hematopathology. [edited by] Jaffe, ES. 1st. ed. Elsevier, Inc. © 2011.