Conversion and dissociative disorders have psychopathological mechanisms in common and can simultaneously be present in the same patient. Evidence-based treatments for conversion and dissociative disorders are limited and mostly focused on cognitive-behavioral therapies (CBT) for a few conversion disorders. Avoidance and difficulties in emotion expression are thought to explain conversion and hence, mindfulness-based therapies (MBTs) could hypothetically constitute a beneficial intervention. Here, we present the case of Anne, a 31-year-old female with a long-term history of depression, anxiety, and psychogenic nonepileptic seizures (PNES). While facing health-related and marital stressors, Anne acutely developed conversion left-sided paralysis, psychogenic bilateral tremor, and dissociative amnesia and had an increase in PNES frequency. Some of these newly developed symptoms resolved and other improved significantly after an acceptance and commitment therapy (ACT) intervention was offered during a brief inpatient hospitalization. This constitutes the first report of an ACT-based intervention used in this type of clinical syndromes.
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