On examination, a patient is found to have symmetrical, non-tender swelling with bilateral involvement of DIP joints.Rheumatoid factor is negative. What is the most likely associated condition?

1. A

   Synovial inflammation

2. B

   Rheumatoid nodules

3. C

   Uric acid crystal deposition

4. D

   Osteophyte formation

Appeared in: AIIMS M.Sc. Nsg Entrance exam-2026

Explanation

• The clinical picture of symmetrical, non-tender swelling of the distal interphalangeal (DIP) joints is a classic presentation of Osteoarthritis (OA).
• The underlying pathological process causing this specific type of bony enlargement in OA is the formation of osteophytes, also known as bone spurs.
• When osteophytes occur at the DIP joints, they are called Heberden's nodes. These are hard, bony growths, which explains the non-tender nature of the swelling.
• A negative Rheumatoid Factor (RF) test helps to differentiate OA, a degenerative condition, from Rheumatoid Arthritis, an autoimmune inflammatory condition where RF is often positive.

Why Other Options Were Wrong

• Option A: Synovial inflammation (synovitis) is the hallmark of inflammatory arthritis like RA. It causes warm, tender, and 'boggy' (soft) swelling, not the hard, non-tender swelling described in the question.
• Option B: Rheumatoid nodules are subcutaneous lumps found over pressure points in patients with seropositive (RF-positive) RA. The patient is RF-negative, and the swelling is a bony enlargement of the joint itself.
• Option C: Uric acid crystal deposition causes gout, which characteristically presents as an acute, intensely painful, red, and swollen single joint (acute monoarthritis). This presentation is very different from the chronic, non-tender, symmetrical swelling seen in the patient.

Related Visual

• Visual 1: Illustration - A diagram comparing a healthy hand joint with a joint affected by osteoarthritis, clearly showing the formation of osteophytes (Heberden's nodes at the DIP joint).
• Visual 2: Clinical Photograph - An image of a patient's hands showing characteristic Heberden's nodes (at the DIP joints) and Bouchard's nodes (at the PIP joints) to help visualize the clinical signs of osteoarthritis.
• Visual 3: Table - A comparative table highlighting the key differences in joint involvement patterns between Osteoarthritis (DIP, PIP, CMC) and Rheumatoid Arthritis (MCP, PIP, Wrist).

Clinical Relevance

• Nursing practice connection: Use the key finding related to Differential diagnosis of arthritis based on clinical presentation and pathophysiology to guide bedside assessment, documentation, and the next nursing action.
• Accurately differentiating between osteoarthritis and inflammatory arthritis like RA is crucial for nurses as the management, patient education, and prognosis are vastly different.
• Patient education for OA focuses on lifestyle modifications (weight management, exercise), pain management (analgesics, NSAIDs), and joint protection, whereas RA requires early intervention with disease-modifying antirheumatic drugs (DMARDs) to prevent irreversible joint damage.
• What if? If the patient's swelling was described as 'warm, tender, and boggy' and primarily involved the metacarpophalangeal (MCP) joints, the most likely associated condition would be synovial inflammation, pointing towards a diagnosis of Rheumatoid Arthritis, even with a negative RF (seronegative RA).

How to Approach the Question

• First, analyze the clinical vignette for key descriptors. Note the characteristics of the swelling ('symmetrical', 'non-tender'), the location ('bilateral DIP joints'), and the lab result ('Rheumatoid factor is negative').
• Consider each option and how it relates to different types of arthritis.
• Evaluate 'Synovial inflammation'. This is linked to inflammatory arthritis (like RA), which typically causes tender, warm swelling, not non-tender swelling.
• Evaluate 'Rheumatoid nodules'. These are associated with RF-positive RA, but the patient is RF-negative.
• Evaluate 'Uric acid crystal deposition'. This causes gout, known for acute, severe, painful monoarthritis, not chronic symmetrical non-tender swelling.
• Evaluate 'Osteophyte formation'. This process creates bone spurs, which are the cause of Heberden's nodes at the DIP joints in osteoarthritis. This matches all the clinical findings: DIP involvement, non-tender bony swelling, and a negative RF test.

Concept Tested & Keywords

• Concept Tested: Differential diagnosis of arthritis based on clinical presentation and pathophysiology.
• Stem keywords: symmetrical, non-tender swelling, bilateral involvement, DIP joints, Rheumatoid factor negative
• Lead-in keywords: most likely associated condition
• Clinical cues: The combination of DIP joint involvement, non-tender swelling, and negative RF are classic pointers towards Osteoarthritis.

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