Which medical condition can lead to an increased risk of fractures due to weakened bones?

Osteoporosis is a medical condition characterized by decreased bone density and deterioration of bone tissue, which significantly increases the risk of fractures. This occurs because the bones become porous and brittle, making them more susceptible to breaking under stress or even with minimal trauma. Osteoporosis can be caused by various factors, including aging, hormonal changes (such as decreased estrogen in postmenopausal women), insufficient calcium and vitamin D intake, and certain medical conditions or medications.

In contrast, while osteoarthritis and rheumatoid arthritis involve joint damage and pain, they do not primarily impact the bone density itself in the same way osteoporosis does. Osteomyelitis refers to an infection of the bone, which does not inherently cause bone weakening leading to fractures. Hence, osteoporosis is the condition most directly associated with an increased risk of fractures due to compromised bone strength.