Psychodynamic diagnostic manual(PDM) was created by collaborative work of organizations in the field of mental health and an international authorial group, with the aim of supplementing currently valid diagnostic systems ICD-10 and DSM-IV-TR and improving the quality of diagnostics and therapy of mental disorders. PDM is based on traditional psychoanalytical and psychodynamic concepts of mental disorders genesis,currently valid diagnostic systems, new insights in the area of neurosciences, as well as on the evaluation of outcomes of different therapeutic approaches. The purpose of this paper is the usage of the useful guide in clinical practice with the aim of diagnosing mental disorder in the case of the described patient from the point of view of three axis diagnostic system offered by PDM, with reference to indication of a type of psychoanalytical psychotherapeutic approach applied in her tretman.The multiaxis diagnostic system of PDM has been used in the metodology of this paper. Based on this reserch we conclude that the described patient suffers from somatising personality disorder, also possesses the level of mental functioning with moderate to higher degree of limitation, and symptomatically demonstrates somatiform disorder from the class of gastriointestinal system dysfunction, and anxious disorder from a class of phobia.The mind-set of the patient, a chronic somatiser, and a limited level of her mental functions wich suggests the inclination to a borderline level of personalitz organisation indicate and adduce plausible grounds for using suppportive-expressive psychoanalztical psychotherapeutic approach in the treatment of the patient.