While not yet validated, ctDNA is being used by clinical experts as a de-escalation tool to provide confidence when stopping long-term maintenance therapies like PARP inhibitors. This novel application focuses on reducing treatment burden rather than solely detecting disease progression.

Despite extensive investigation, adding interferon to tyrosine kinase inhibitors (TKIs) does not significantly improve rates of deep molecular response or treatment-free remission in CML. Based on consistent data, its use is no longer recommended except as a bridging therapy for pregnant patients.

When starting a BTK inhibitor for CLL, patients often experience a sharp increase in their lymphocyte count. This is not a sign of disease progression but a therapeutic effect as the drug forces malignant cells out of the lymph nodes. This effect typically normalizes over 6-8 weeks and should be explained to patients.

While not standard of care, TPO receptor agonists like romiplostim can be used in the third trimester of pregnancy to raise platelet counts above 75,000 for epidural anesthesia. This is considered a reasonable option after critical fetal development is complete, avoiding the need for pre-pregnancy splenectomy.

For mantle cell lymphoma patients on a BTK inhibitor who are progressing, the drug should be continued until immediately before leukapheresis for CAR T-cell therapy. Abruptly stopping the BTKi can lead to an explosive disease flare, potentially making the patient too unstable to proceed with T-cell collection.

The primary goal in Chronic Myeloid Leukemia (CML) has evolved from survival to tolerability and treatment-free remission. These goals are not uniform; younger patients prioritize stopping treatment to start families, while long-term patients increasingly value better tolerability over marginal efficacy gains.

If a patient's CLL therapy is stopped for another major health issue, such as a second cancer, clinicians should often observe them post-recovery rather than immediately restarting treatment. This approach is recommended even with detectable Minimal Residual Disease (MRD) to prioritize the patient's immune system recovery and overall health.

Clinicians should interpret anemia in myelofibrosis patients on JAK inhibitors based on its timing. Anemia in the first 16 weeks is an expected on-target effect. In contrast, new anemia in a patient on a stable dose is a warning sign that may indicate disease progression, warranting further investigation.

Post-transplant maintenance strategy differs by mutation. For high-risk KMT2A-rearranged AML with less sensitive monitoring, maintenance is strongly considered. For NPM1-mutated AML, clinicians rely on highly sensitive qPCR for Minimal Residual Disease (MRD); if a patient is MRD-negative, they often forgo maintenance therapy.