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Pathology
A stenotic valve is removed from a 70-year-old man. The value demonstrates hard nodular masses heaped up within the sinuses of Valsalva. On microscopic section, the acellular masses stain darkly blue with hematoxylin and eosin. Which of the following is the MOST significant constituent of the masses?
Calcium oxalates
Calcium phosphates
Complexed iron
Magnesium phosphates
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