Pervasive refusal syndrome or anorexia nervosa: a case report with a successful behavioural treatment

Pervasive refusal syndrome (PRS) is a rare psychiatric disease that affects children. It was first described by Lask in 1991 (Arch Dis Child 66:866–869, 1991). Recently, Otasowie and Collaborators reported a systematic review about PRS. Despite this, PRS has not yet been classified in DSM-5 and ICD-11 and the lack of evidence-based treatment makes this syndrome a real challenge for clinicians. The aim of this paper is to present our experience through the description of a case report and its treatment. The case reported is a girl aged 11 years that fits the clinical picture described in the literature of PRS. In previous reports, behavioural treatment was not used or appreciated; our case adds new knowledge regarding the PRS diagnosis and the successful behavioural treatment during hospitalization, which we describe in all its phases. PRS is a rare, life-threatening syndrome; it would be extremely important to have an official and evidence-based treatment guide. Level V, case report.