![]() ![]() This may be the only overt manifestation of psychosis. In such cases, there is a fixed, false belief by the patient that they are infested with parasites.Delusional disorderĪ delusional disorder may present as delusions of parasitosis. There are four main types of primary psychocutaneous diseases. Psychiatric disorders can either lead to psychocutaneous (skin) manifestations as a consequence or they may arise as a result of a chronic dermatological condition that impacts on the patient’s mental health. They generally involve disturbances of emotion, cognition, motivation and socialisation. Psychiatric disorders are central nervous system conditions with a neurobiological basis. ![]() Visual field defects are also common if the occipital cortex of the brain is involved. Neurological features are progressive and can include seizures, focal neurological deficits and intellectual disability. This often causes corresponding neurological and ocular deficits. Sturge–Weber syndrome is a rare disorder that involves vascular malformations affecting the face and eye, which correspond with a leptomeningeal angioma, a vascular tumour in the brain.
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