four to eight weeks after daily injections of the vitamin d metabolites the 1.25-dhcc treated rats exhibited significantly increased serum calcium concentrations and parathyroid glands composed of atrophic and dark chief cells in solid and follicular arrangement , whereas the rats treated with 25-hcc showed unaffected serum calcium concentrations and parathyroid glands composed of solid sheets of light chief cells , often with vacuolated cytoplasm , a few dark chief cells , but no atrophic cells .
C0010834
cytoplasm
C0007634
cells