Below is an instruction from Human. Write a response.
    ### Instruction:
    What is (are) Chondrocalcinosis 2 ?
    ### Response:
    Chondrocalcinosis 2 is a rare condition characterized by the accumulation of calcium pyrophosphate dihydrate crystals in and around the joints. A buildup of these crystals can lead to progressive (worsening over time) joint damage. Some affected people may not have any signs or symptoms of the condition.
    