Prosopometamorphopsia

Prosopometamorphopsia
Pronunciation
  • pro-so-po-met-uh-morph-op-sia
SpecialtyNeurology
FrequencyFewer than 100 cases

Prosopometamorphopsia (PMO), also known as demon face syndrome, is a neurological disorder characterized by altered perceptions of faces. In the perception of a person with the disorder, facial features are distorted in a variety of ways including drooping, swelling, discoloration, and shifts of position.

Prosopometamorphopsia is distinct from prosopagnosia, which is characterised by the inability to recognise faces.

About 75-81 cases of prosopometamorphopsia have been reported in scientific literature since 1904. In about half of the reported cases, features on both sides of the face appear distorted. In the other half of the cases, distortions are restricted to one side of the face (left or right), called hemi-prosopometamorphopsia.

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