This is a long-term safety and efficacy follow-up study for subjects with Fanconi Anaemia Subtype A who have been treated with ex vivo gene therapy on the FANCOLEN-I trial. After completion of the FANCOLEN-I study, eligible subjects will be followed for a total of 15 years post gene therapy treatment. No investigational drug product will be administered during this study.

This long-term follow-up protocol will evaluate the long term safety and efficacy of the infusion of autologous CD34+ cells transduced with lentiviral vector (LV) carrying the FANCA gene.

Inclusion Criteria:

1. Enrolled in the FANCOLEN-I study
2. Treated with gene therapy in the FANCOLEN-I study
3. Able to adhere to the study visit schedule and protocol requirements
4. Provided written informed consent and, as applicable, assent to participate

Exclusion Criteria:

• There are no exclusion criteria for this study

Subjects with Fanconi anemia subtype A who have been treated with ex vivo gene therapy product in FANCOLEN-I study