This extension study is designed to enroll participants with hematologic malignancies who are receiving clinical benefit from tafasitamab treatment in a parent study with tafasitamab..

Inclusion Criteria:

• Capable of giving signed informed consent which includes compliance with the requirements and restrictions listed in the informed consent form (ICF) and in this protocol.
• Having been enrolled and is still receiving treatment with tafasitamab at the end of a parent tafasitamab clinical study.
• Is tolerating tafasitamab treatment at the dose specified in the parent protocol as assessed by the Investigator.
• Is in complete/partial response or stable disease and is receiving clinical benefit from treatment with tafasitamab in the parent study, as assessed by the Investigator.
• Has demonstrated compliance, as assessed by the Investigator, with the parent protocol requirements.
• Willingness and ability to comply with scheduled visits, treatment plans, and any other study procedures indicated in this protocol.

Exclusion Criteria:

• Patient who is legally institutionalized, or under judicial protection.
• Has met one or more criteria for permanent tafasitamab treatment discontinuation as stipulated in the parent protocol.
• Able to access tafasitamab outside a clinical study.
• Patient with an uncontrolled intercurrent illness or any concurrent condition that, in the Investigator's opinion, would jeopardize the safety of the patient or compliance with the protocol.
• A female patient who is pregnant confirmed by a pregnancy test prior to enrollment, breastfeeding, or a woman of childbearing potential (WOCBP) who does not agree to follow the contraceptive guidance during the treatment period and for at least 3 months after the last dose of study treatment, and does not refrain from donating oocytes during this period.
• A male patient who does not agree to use contraception as detailed in the contraceptive guidance during the treatment period and for at least 3 months after the last dose of study treatment (if they have a heterosexual partner who is a woman of childbearing potential) and who does not refrain from donating sperm during this period.

Incyte shares data with qualified external researchers after a research proposal is submitted. These requests are reviewed and approved by a review panel on the basis of scientific merit. All data provided is anonymized to respect the privacy of patients who have participated in the trial in line with applicable laws and regulations. The trial data availability is according to the criteria and process described on https://www.incyte.com/our-company/compliance-and-transparency

Data will be shared after the primary publication or 2 years after the study has ended for market authorized products and indications.

Data from eligible studies will be shared with qualified researchers according to the criteria and process described in the Data Sharing section of the www.incyteclinicaltrials.com website. For approved requests, the researchers will be granted access to anonymized data under the terms of a data sharing agreement.