Brain sand

calcareous matter found in the pineal gland.

brain sand

sand

[sand] material occurring in fine gritty particles.brain sand sandy matter about the pineal gland and other parts of the brain.

cor·'po·ra ar·e·na·'ce·a

small calcareous concretions in the stroma of the pineal and other central nervous system tissues. Synonym(s): acervulus, brain sand, psammoma bodies (2)

brain sand

X-ray opaque calcified granules in the pineal gland commonly present in adult life. The condition is harmless and may prove clinically useful as it may demonstrate shifting of the pineal to one side as a result of a space-occupying condition on the other. Also known as acervulus cerebri.

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