Résumé : Background: It is known that youth aged 16 to 23 are more vulnerable to mental distress than other age groups. This vulnerability can be explained by several factors such as the high prevalence of mental illnesses, the changes in the environment, the social expectations and so on. Moreover, in this age group the transition between Child and Adolescent Mental Health Services (CAMHS) and Adult Mental Health Services (AMHS) impacts the continuity of care, leading to a negative impact on the prognosis. This article aims to characterize this population based on risk factors, history of care and care plan. Subjects and method: We conducted a retrospective study including patients who attended transition psychiatry consultations between October 2020 and December 2023. Data were collected at a secondary care outpatient service. Results: The sample (n=122) was predominantly female (70.5%, n=86). Referrals were mostly made by psychologists (35.2%, n=43), although many individuals were self-referred (32%, n=39). In most cases, the consultation request came directly from the young person (60.7%, n=74). Regarding previous mental health support, 79.5% (n=97) had already received psychological care at the time of their transition consultation. In terms of risk factors, many participants had been exposed to adverse childhood experiences (ACE): 60% (n=69) reported a first-degree family history of psychiatric disorders, 28% (n=33) had experienced sexual abuse, and 37.3% (n=44) had been exposed to domestic violence. Among those who received follow-up care, 19.7% (n=24) were scheduled for planned inpatient care. Psychotherapeutic follow-up was offered to 79.6% of patients, and psychotropic medication was recommended for 68.9%. Conclusion: This research highlights the major vulnerability of transition-aged youth (TAY) and reinforces the need for specialized care and continuity between CAMHS and AMHS.