What is the name of the condition characterized by weakened bones that break easily?

The condition characterized by weakened bones that break easily is known as Osteogenesis imperfecta. This disorder is caused by a genetic defect that affects the production of collagen, a crucial protein for bone strength. As a result, individuals with Osteogenesis imperfecta experience fragile bones that can fracture easily, often with little or no apparent cause. This condition is also commonly referred to as "brittle bone disease."

Understanding the different terms is essential here. Osteomalacia refers to the softening of bones due to vitamin D deficiency but does not specifically encompass the genetic aspects or the repeated fractures seen in Osteogenesis imperfecta. Myositis is an inflammatory condition affecting muscles, and osteosarcoma is a type of bone cancer that can weaken bones but is distinctly different from the genetic and congenital nature of Osteogenesis imperfecta. This clarity on the characteristics of the listed conditions helps reinforce why Osteogenesis imperfecta is the appropriate term for fragile bones that are prone to breaking.