Stuttering is a speech disorder characterized by involuntary repetition, prolongation or cessation of a sound. This dysfluency may be developmental or acquired. Acquired dysfluency can be classified as neurogenic or psychogenic.

This case report aims to describe and discuss a case of psychogenic stuttering, providing an updated review on this disorder.

In and outpatient interviews were performed by Neurology and Psychiatry. Investigation to exclude organic causes included lab exams, electrocardiogram, electroencephalography, computed tomography scan and magnetic resonance imaging. A literature review in Science Direct database, with the keywords “psychogenic stuttering”, was also conducted.

A 63-year-old man was admitted to the Beatriz Ângelo Hospital with an acute stuttering. Speech was characterized by the repetition of initial or stressed syllables, little affected by reading out loud or singing. Comprehension, syntaxes and semantic were not compromised, as weren’t sensory and motor abilities. During admission, stuttering characteristics changed. Multiple somatic complaints and stress prior to the onset and bizarre secondary behaviors were also detected. Work-up didn’t show an organic etiology for that sudden change. An iatrogenic etiology was considered, as sertraline and topiramate were started for depression 1 month before. However, the stuttering pattern, the negative results, the psychological and the social life events suggested a psychogenic etiology.

Psychogenic stuttering finds its origin in psychological or emotional problems. It is best classified as a conversion reaction. The differential diagnosis between psychogenic and neurological stuttering can be challenging.