The objective is to understand how a population of adolescents - who have undergone diaphragm surgery within their first month of life (i.e. subjects who have been carriers of a rare impacting disease such as congenital diaphragmatic hernia (CDH)) - engages in physical and sports activities and what can be the hindering factors as well as the factors facilitating these practices.

Based on self-questionnaires and semi-structured interviews, this research is a qualitative research in the field of human and social sciences.

The qualitative survey will make it possible to report on the experience of the disease of children and parents; in parallel, a complete medical evaluation of the subjects (clinical and para-clinical) will be carried out.

The analysis of the verbatim of the self-questionnaires and interviews with regard to the real physical capacities of the subjects, will be discussed.

Inclusion Criteria:

• Child/adolescent having undergone surgery for CDH in the first month of life, aged 12 to 18 years; absence of polypathology (i.e. diaphragmatic hernia not associated with another pathology); follow-up at the CDH reference centre, Lille site
• Written consent from both parents allowing the collection of data from the child/adolescent
• Written consent from the parent(s) agreeing to participate in the study by answering the questionnaires and the individual interview, for themselves and for their child
• Possibility of accessing equipment to conduct a video-conference interview if necessary.

Exclusion Criteria:

• Parents or child/adolescent not understanding French
• Parents under guardianship or child under legal protection

All adolescents who had CDH surgery in the first month of life, without any other pathology, now aged 12-18 and followed up at the CDH Lille Reference Center, will be asked to take part in the study.