Pheochromocytoma and Paraganglioma Genetic Testing: Psychological Impact

Objective: Genetic testing is recommended for all pheochromocytoma/paraganglioma tumor-affected patients and, if positive, for their relatives, who are at risk of developing tumors. This study aims to assess the previously unexamined psychological impact of genetic testing and identify factors associated with this impact. Method: A nationwide sample of 103 individuals carrying succinate dehydrogenase mutations answered the Multidimensional Impact of Cancer Risk Assessment (MICRA) questionnaire plus two measures of general well-being (the SF-36 Health Survey and the Hospital Anxiety and Depression scale). Sociodemographic, clinical, and personality characteristics (the 5 personality factors and locus of control) were also assessed. Data were analyzed with bivariate and GLM univariate analyses. Results: Genetic testing-related mean scores were 6.12 for Distress, 11.58 for Uncertainty, 10.61 for Positive experiences, and almost 30% of the sample displayed high MICRA global suffering. Tumor-affected participants whose neoplasia was identified through presymptomatic screening felt that the genetic test has made it easier to cope with their disease. Significant aspects associated with genetic-testing-related Distress and Uncertainty included higher levels of Neuroticism and Agreeableness. An interaction between having the neoplasia and having children was also associated with higher levels of Distress. Education and Conscientiousness were associated with Positive experiences. Affected mutation carriers presented lower global quality of life and higher anxiety and depression levels than healthy mutation carriers. Conclusions: Genetic testing's impact depends on individual characteristics. The identified characteristics can inform clinical practice regarding who might benefit from special care in genetic counseling.