Germering

Researchers are evaluating the effectiveness and safety of a subcutaneous treatment using one cycle of cladribine for patients with hairy cell leukemia who need treatment. This study focuses on patients who are either untreated or have been previously treated only with alpha-interferon. The goal is to determine the rate of complete remission and to assess whether a second cycle of treatment benefits those with a non-optimal response, defined as detectable residual disease or partial remission four months after the initial treatment. Participants receive cladribine at a dose of 0.14 mgkg body weight administered subcutaneously as a bolus injection once daily for five consecutive days. After four months, remission status is evaluated. Patients showing non-optimal response may be considered for a second treatment cycle. This phase 23 trial is designed to optimize therapy for hairy cell leukemia by closely monitoring treatment response and toxicity. During the study, participants undergo evaluations including disease status assessment through bone marrow and blood tests, with a focus on remission rates four months post-treatment. Researchers track complete remission rates and monitor for residual disease. Safety is also monitored by assessing potential toxicities. Participants general health status and other laboratory tests are reviewed to ensure eligibility and ongoing suitability for treatment throughout the study period, which spans several months with follow-up assessments.