Graph showing Kaplan-Meier survival curves, given by stage of lymph node involvement in CTCL. Comparison of Kaplan-Meier survival estimates in patients with CTCL with different stages of lymph node involvement analyzed by histology and PCR (A-C). (A) Patients with no evidence of a lymph node manifestation of lymphoma by histology and PCR analysis. (B) Patients with no histologic lymph node involvement but with detection of a clonal TCR-rearrangement within the lymph node. (C) Patients with both histologic lymph node manifestation and detection of a clonal T-cell population.