Retro-prospective Observational Study on Risk of Progression in CP-CML Patients Eligible for TKI Discontinuation

Chronic Myeloid Leukemia Clinical Trial

Official title: Retro-prospective Observational Study on Risk of Progression in Chronic Phase-Chronic Myeloid Leukemia Patients Eligible for Tyrosine Kinase Inhibitor Discontinuation (TFR - PRO)

Status Recruiting

Clinical Trial Summary

The purpose of this study is to investigate the safety profile of TKI discontinuation in clinical practice, with particular regard on the risk of progression after treatment discontinuation.

Clinical Trial Description

This study will enroll approximately 3000 CP-CML patients that must have a history of at least 4 years of TKI treatment and at least 18 months of DMR. Events developing in patients after the end of discontinuation and TKI resumption will be considered as linked to the discontinuation if they will develop within 36 months from the end of discontinuation. This rule will apply also to subsequent TD attempts. In case of a second or subsequent discontinuation attempt after the failure of a previous one (for molecular relapse), patients must have re-achieved a DMR with TKI therapy resumption and must keep DMR for at least 18 months before another TD.

Collection of data will be retrospective and prospective, as each center will collect the data for 24 months. Patients who discontinued before the opening of this study will contribute to the retrospective cohort, while those who will discontinue after it will contribute to the prospective cohort. Patients who discontinued before the opening of this study but will continue their discontinuation after it, will contribute to both cohorts. For patients prospectively recruited, monitoring of disease status will be performed to assess the maintenance of the molecular remission during the study period.

Patients with an atypical BCR-ABL1 fusion gene, which does not allow the use of Q-RT-PCR, will be monitored by qualitative PCR and will be analyzed separately. For these patients, negativity of nested qualitative RT-PCR will be considered a surrogate of DMR of patients monitored by Q-RT-PCR, while loss of negativity of first-round qualitative PCR will be considered a surrogate of loss of MMR (i.e. molecular relapse). Accordingly, for patients monitored by qualitative PCR, TKI resumption after TD will be provided in case of a new positivity of first-round PCR.

. ;

Related Conditions & MeSH terms

• Chronic Myeloid Leukemia
• Leukemia
• Leukemia, Myelogenous, Chronic, BCR-ABL Positive
• Leukemia, Myeloid

• NCT number: NCT04621851
• Study type: Observational [Patient Registry]
• Source: University of Milano Bicocca
• Contact: CARLO GAMBACORTI PASSERINI
• Phone: +39 233.9553
• Email: carlo.gambacorti@unimib.it
• Status: Recruiting
• Start date: September 30, 2020
• Completion date: September 30, 2023