Abstract
PLACK syndrome (OMIM 616295) is a rare genodermatosis associated with peeling skin, leukonychia, acral punctate keratosis, cheilitis, and knuckle pads and is caused by loss-of-function mutations in the CAST gene, which encodes calpastatin, a calcium-dependent protease. This case report highlights a case of PLACK syndrome presenting with the unique findings of striate hyperkeratosis on the palms as well as life-threatening cardiomyopathy. We review why CAST mutations might impact cardiac function and raise awareness of the potential association between PLACK syndrome and cardiac manifestations.
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