Extra-aicular manifestations of RA ?
**Core Concept**
Rheumatoid Arthritis (RA) is a chronic autoimmune disorder characterized by inflammation of the synovial joints, leading to extra-articular manifestations due to systemic inflammation and immune complex deposition. These manifestations can affect various organs and systems, including the skin, eyes, lungs, heart, and nervous system.
**Why the Correct Answer is Right**
Extra-articular manifestations of RA are a result of the systemic inflammatory process, which can lead to the deposition of immune complexes in various tissues. This can cause symptoms such as nodules, vasculitis, and neuropathy. The correct answer is related to the pathophysiology of RA and its systemic effects. For example, **Option C** is related to the development of rheumatoid nodules, which are a common extra-articular manifestation of RA.
**Why Each Wrong Option is Incorrect**
* **Option A:** This option is incorrect because it does not accurately describe a common extra-articular manifestation of RA. While RA can affect the skin, this option does not specifically relate to the systemic effects of the disease.
* **Option B:** This option is incorrect because it is not a recognized extra-articular manifestation of RA. The correct answer is related to the pathophysiology of RA and its systemic effects.
* **Option D:** This option is incorrect because it is a treatment option for RA, rather than an extra-articular manifestation.
**Clinical Pearl / High-Yield Fact**
One important clinical correlation to remember is that extra-articular manifestations of RA can occur in up to 25% of patients, and can significantly impact disease prognosis and management.
**Correct Answer:** C. Rheumatoid nodules