Content Validation of Quality of Life and Symptom Questionnaires for Pheochromocytoma and Paraganglioma

Inclusion Criteria: * Provide written informed consent and be willing to comply with protocol requirements * Participant is aged ≥ 18 * Have a documented (medical record) diagnosis of either pheochromocytoma or paraganglioma with active symptoms or within 60 days of curative therapy Exclusion Criteria: Patient is currently asymptomatic from pheochromocytoma/paraganglioma diagnosis or duration \> 60 days from curative therapy * Participant has a clinically significant disorder, including alcohol or drug abuse, which may interfere with study participation or which may affect the outcome of the study as judged by the investigator. * Participant has a mental disability or significant mental illness, legal incapacity or limited legal capacity or any other lack of fitness, in the investigator's opinion, to preclude the subject's participation in or ability to complete the study. * Participant is currently too unwell to take part in the study.