Reduced bone mineral density Patchy changes of bone mineral density Patchy variation in bone mineral density 2010-02-25T10:49:23Z Patchy increased and decreased bone mineral density UMLS:C4021245 HP:0010659 Patchy (irregular) changes in bone mineral density with patches of bone showing an increased density side to side with patches that are affected by reduction of mineral density. This is sometimes referred to as a moth-eaten appearance on x-rays.