. "OsteoporosisPTNCI" . "Osteoporosis"^^ . "A condition that is marked by a decrease in bone mass and density, causing bones to become fragile.NCI-GLOSS" . "C0029456"^^ . "Disease or Syndrome"^^ . "OsteoporosisPTCTCAEE12508" . "osteoporosisPTNCI-GLOSSCDR0000045371" . "C3298"^^ . "A condition of reduced bone mass, with decreased cortical thickness and a decrease in the number and size of the trabeculae of cancellous bone (but normal chemical composition), resulting in increased fracture incidence. Osteoporosis is classified as primary (Type 1, postmenopausal osteoporosis; Type 2, age-associated osteoporosis; and idiopathic, which can affect juveniles, premenopausal women, and middle-aged men) and secondary osteoporosis (which results from an identifiable cause of bone mass loss).NCI" . . . "Osteoporosis"^^ . "Osteoporosis"^^ . "A disorder characterized by reduced bone mass, with a decrease in cortical thickness and in the number and size of the trabeculae of cancellous bone (but normal chemical composition), resulting in increased fracture incidence.CTCAE" .