Syndrome that is characterized by progressive hyalinosis involving capillaries and often arterioles and small veins of the digestive tract and kidneys and idiopathic cerebral calcifications. It has been described in three sisters born to non-consanguineous parents. All three patients also had poikiloderma and graying hair, as well as severe diarrhea, rectal bleeding, malabsorption and subarachnoid hemorrhage. [from SNOMEDCT_US]