A condition where the cartilage under the kneecap softens and deteriorates, often causing pain and weakness in the knee.
From Greek 'chondros' (cartilage) + 'malacia' (softening). The term 'malacia' comes from Greek 'malakos' (soft) and has been used in medicine since ancient times to describe tissue degeneration.
Runner's knee is the most common form of chondromalacia, and it shows how repetitive motion can literally wear down cartilage over time—which is why athletes need proper training and rest.
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