**Core Concept:** Calcium Pyrophosphate Dehydrate (CPPD) crystals are inorganic crystals that can form within body tissues. When deposited in joints, they can cause a group of joint disorders known as pseudogout or chondrocalcinosis.

**Why the Correct Answer is Right:** Calcium pyrophosphate dehydrate (CPPD) crystals are a component of the mineralized extracellular matrix in cartilage and bones. When these crystals disperse into the joint fluid, they can cause inflammation and lead to the development of pseudogout, a form of arthritis.

**Why Each Wrong Option is Incorrect:**
A. Osteoarthritis (OA) is a degenerative joint disease, not directly related to CPPD crystals.
B. Rheumatoid arthritis (RA) is an autoimmune disease, not related to CPPD crystals.
C. Gout is caused by deposition of urate crystals, not CPPD crystals.
D. Sjogren's syndrome is an autoimmune disorder, not specifically associated with CPPD crystals.

**Clinical Pearl / High-Yield Fact:** CPPD arthropathy can occur in up to 20% of individuals older than 60 years, particularly those with underlying joint degenerative changes. It is important to recognize pseudogout to differentiate it from other joint inflammation causes like gout, which is caused by deposition of monosodium urate crystals.

**Correct Answer:** C. Gout

**Explanation:** Calcium pyrophosphate dehydrate (CPPD) crystals can disperse into the joint fluid and lead to pseudogout or chondrocalcinosis. However, the correct answer is Gout as it is caused by deposition of monosodium urate crystals, while pseudogout is associated with CPPD crystals.