Autoimmunity against the synovial membrane at joint is called.

Options

A. multiple sclerosis
B. I.D.D.M.
C. Hashimoto disease
D. Rheumatoid arthritis

Answer

To answer the question "Autoimmunity against the synovial membrane at joint is called," we need to follow these steps:

### Step-by-Step Solution:

1. **Understand Autoimmunity**:
- Autoimmunity occurs when the immune system mistakenly attacks the body's own tissues, treating them as foreign invaders. This can lead to various autoimmune diseases.

2. **Identify the Synovial Membrane**:
- The synovial membrane is a specialized tissue that lines the joints, particularly synovial joints (like the knee). It produces synovial fluid, which lubricates the joint and allows for smooth movement.

3. **Recognize the Condition**:
- When the immune system targets the synovial membrane, it leads to inflammation and damage in that area. This specific condition is characterized by pain and swelling in the joints.

4. **Identify the Correct Term**:
- The autoimmune condition that specifically targets the synovial membrane is known as Rheumatoid Arthritis. It is a chronic inflammatory disorder that primarily affects joints but can also have systemic effects.

5. **Eliminate Incorrect Options**:
- Other autoimmune diseases mentioned, such as Multiple Sclerosis, Insulin Dependent Diabetes Mellitus (IDDM), and Hashimoto's disease, affect different tissues or organs and are not related to the synovial membrane.

6. **Conclude with the Answer**:
- Therefore, the correct answer to the question is "Rheumatoid Arthritis."

### Final Answer:
Autoimmunity against the synovial membrane at joint is called **Rheumatoid Arthritis**.

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