A disorder of old age in which joint cartilage wears away,exposing bone to bone is:

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The disorder described is osteoarthritis, which is a degenerative joint disease that mostly affects old age people. It happens when joint cartilage gets worn away, leading to bone-on-bone contact, causing pain and mobility issues. Acromegaly is a hormonal disorder that happens when the pituitary gland produces excess growth hormone. Rheumatoid arthritis is an autoimmune disease that affects the joints. Scoliosis is a medical condition in which the spine curves abnormally. Osteoporosis is a bone disease that causes bone fragility.

A Disorder of Old Age in Which Joint Cartilage Wears