label: Progressive Hairy Cell Leukemia Initial Treatment
label_lc: progressive hairy cell leukemia initial treatment
description: A hairy cell leukemia requiring initial treatment because of the presence of signs of progression.  Signs of progression include cytopenia (especially if symptomatic), increasing splenomegaly, and infectious complications.  Therapy is not necessary if the patients are asymptomatic and the blood counts are maintained in an acceptable range.