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Le schwannome vestibulaire et sa chirurgie : impact de la taille de la tumeur et des facteurs psychologiques sur les modalités de compensation de la fonction d’équilibration

Abstract : The vestibular schwannoma (VS) is a benign tumor arising from Schwann cells of the vestibular nerve. This tumor grows slowly in the internal auditory canal and then into the cerebellopontine angle. The slow growth of the tumor leads to a progressive alteration of the vestibular function that affects the function of equilibration. Balance disorders associated to vestibular schwannoma and its surgery have an impact on daily life of patients and affect their quality of life. Individual factors such as age, physical practices or visual preference and factors related to the tumor such as vestibular status or origin of the tumor in the nerve have been identified as having an influence on the postural compensation in patients presenting VS and benefiting a surgical removal of the tumor that leads to an acute unilateral vestibular deafferentation. In line with previous studies, the objectives of this research were to assess the impact of tumor size on balance control and to identify individual psychological factors influencing postural compensation. Psychological factors identified in this research included the personality structure, illness perceptions and coping strategies. An evaluation of the quality of life of patients and their anxiety and depression affects were also realized. Eighty-seven patients were included in the research. Twenty-eight were included in a special protocol including psychological assessments and were evaluated three days before surgery, eight days, one month, three month and one year after surgery. Each patient performed posturography assessment and a videonystagmography. Posturography tests were performed with the SOT (Sensory Organization Test). Psychological questionnaires included the NEO-PI-R (Revised NEO Personality Inventory), the IPQ-R (Revised Illness Perceptions Questionnaire) and the Brief-COPE (coping inventory), the WHOQOL-Bref (World Health Organization Quality of LIFE short form) and the HADS (Hospital Anxiety and Depression Scale). Statistical analysis aimed to identify relationships between postural performances, quality of life and anxiety and depression affects. It also aimed to highlight psychological predictors’ factors to explain postural performances after surgery. The results of this study could help to provide a more personalized management of balance disorders in patients with vestibular schwannoma.
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Laurence Ribeyre. Le schwannome vestibulaire et sa chirurgie : impact de la taille de la tumeur et des facteurs psychologiques sur les modalités de compensation de la fonction d’équilibration. Psychologie. Université de Lorraine, 2015. Français. ⟨NNT : 2015LORR0328⟩. ⟨tel-01752235⟩

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