arthrolith

例句：

1. 1. He was diagnosed with arthrolithiasis, which is a condition characterized by the accumulation of calciumdeposits in the joints.
   他被诊断出患有关节石症，这是一种以关节中钙沉积为特征的疾病。
2. 2. The patient had to undergo surgery to remove the arthrolith from his knee.
   患者不得不接受手术，将膝盖中的关节石取出。
3. 3.Arthrolithiasis can be caused by various factors, including obesity, aging, and certain medications.
   关节石症可以由多种因素引起，包括肥胖、衰老以及某些药物。