IntroductionPatient's outgroup socialization may be a problem in the psychotherapeutic group functioning. Disadvantages – and even benefits – of this common issue in psychotherapy have been described (Vinogradov S., Yalom I.). However, the impact of new social networks – that facilitate other ways of immediate and easy communication – on this phenomenon is still unknown.Aims and objectivesTo explore the risks of spontaneous “self-help groups” supported by new technologies for the psychotherapeutic group functioning.MethodCourse description of a psychotherapeutic group, composed by patients with eating disorders (bulimia nervosa and binge eating disorder) in the context of a specialized hospital day.ResultsA patient – who has recently had a breakup – asked help to the group through a non-reported whatsapp chat. Gradually, patients used this new channel to express distress and daily interpersonal difficulties, showing less implication in the supervised group sessions. The patient presented a symptomatic relapse with self-harm injuries and severe eating symptoms. Finally, she left the therapy and, in the next weeks, other patients also left the group, due to different reasons, in a “drag phenomenon”. The analysis showed that the formation of this outgroup socialization changed the relationships between members and new roles were taken.ConclusionsIt is necessary to early address the formation of outgroup socialization in the pre-group interview, emphasizing its high risk for the future group functioning. Therapists should consider that out-group communication is common and easy due to new technologies, so the use of specific questionnaires about this issue may prevent or detect pathological events.Disclosure of interestThe authors have not supplied their declaration of competing interest.

INTRODUCTIONThe Eating Disorders Unit (EDU) of the Santa Cristina Hospital (Madrid) is an intensive treatment resource addressed to chronic patients diagnosed with eating disorders (ED) with repeated therapeutic failures and / or psychiatric comorbidities.In recent years the number of patients referred with overweight and obesity is increasing more and more, becoming the 21% of the treated patients.ObjectivesConsidering the increasing demand to treating patients with overweight and obesity and their differential clinical features we created a specific treatment program specially for this population.MethodsEDU is a partial hospitalization resource with two shifts, the one in the afternoon is addressed to patients with impulse control deficit, diagnosed with Bulimia Nervosa and Binge Eating Disorder. The treatment at this Unit is essentially multidisciplinary and mainly based on group dynamics.Overweight and obese patients attend to a specific program to manage eating symptoms, disease awareness and motivation to change, and futhermore to enhance weight loss promoting moderate physical exercise and the acquisition of healthy habits based on the Mediterranean Diet. They are also provided a more homogeneous space to deal with their body dissatisfaction.ResultsPatients who follow the specific overweight / obesity program experience strong group cohesion that is very motivating to introduce progressive changes in self-care.ConclusionsClinical management of overweight and obesity is complicated when there is a comorbid eating disorder. A specific and intensive multidisciplinary treatment is recommended in these type of patients.