The case study presented in this publication was one of the components of an oral examination in the field of clinical psychology, more precisely, mental disorders of an adult, which took place in December 2018. The work was positively evaluated by the Examination Committee, and both written and oral exams were passed. The purpose of this publication was to present an exam case study, which may prove helpful for those preparing for a specialisation exam. As in accordance with the guidelines of the journal, the case study does not constitute the full version presented to the Examination Committee, but contains only the most important information. The authors hope that this case study will contribute to improving the comfort of work on case studies among future specialists. Regardless of the content included in the publication, the most important exam guidelines are available on the website http://psychologia-konsultanci.pl.