Pemphigoïde bulleuse et maladie de Parkinson: à propos d'un cas

Bullous pemphigoid (BP) is an organ-specific autoimmune disease which can be associated with many pathologies including degenerative neurological diseases such as Parkinson's and Alzheimer's disease. Studies have suggested the possibility of crossimmune responses through "epitope spreading". Bullous dermatosis has been reported to be secondary to neurological disease, at intervals ranging from a few months to a maximum of a few years. Then is it an unusual association or a causation? It has been suggested that drug consumption, decubitus lesions, traumatic events as well as reduced immunity can be triggers for BP in patients with neurological disease. We report the case of a 93-year old patient with a 10-year history of advanced Parkinson's disease, hospitalized for the treatment of a common bullous pemphigoid confirmed by histology and immunohistochemistry. The patient was treated with oral corticosteroids. After a week of treatment, the patient died due to septic shock. Neurological disorders represent a real risk factor for BP. BP could be considered as a marker for neurological disorder. These associations are of broad interest, because they can play a role in the etiopathogenesis of BP and contribute to a complete understanding of the causes of these neurodegenerative diseases.