Mast cells are considered sensors of environmental and emotional stress, exist in all body parts and are related to the pathway from stress to inflamamation. Mastocytosis defines a rare disease, characterized by accumulation of abnormal mast cells in multiple organs. Here, we present a 77-year-old woman with a background of aggressive systemic mastocytosis who developed impaired cognition, depression, anxiety, visual hallucinations, delusions and insomnia. Symptoms alleviated only after initiating midostaurin, a tyrosine kinase inhibitor. Systemic mastocytosis should be kept in mind when visual hallucinations are concomitant with chronic or recurrent multi-system disturbances and do not benefit from treatment as usual.
Key words: mastocytosis, mast cell, cognition, brain fog, depression, anxiety, visual hallucination
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