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Dermatology Online Journal

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Secondary bilateral striopallidodentate calcinosis associated with generalized pustular psoriasis (Von Zumbusch)


Bilateral striopallidodentate calcinosis (BSPDC) mentioned in the literature as Fahr's disease (a misnomer), is characterized by symmetrical and bilateral intracerebral calcifications located in the basal ganglia with or without deposits in the dentate nucleus, thalamus, and white matter. This entity is usually asymptomatic but may be manifested by neurological symptoms. Idiopathic BSPDC can occur either as sporadic or autosomal dominant familial forms. Secondary presentations of BSPDC are associated with infections, neoplastic diseases, toxicological or traumatic factors, and metabolic disorders. We describe a case of generalized pustular psoriasis associated with secondary BSPDC owing to pseudohypoparathyroidism. Laboratory tests revealed hypocalcemia, hyperphosphatemia, and a normal serum level of parathormone. The correction of the phosphorus-calcium metabolism disorder produced clinical improvement.

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