A 58-year-old man from Mumbai presents with a 2-year history of progressive pain and swelling in his right hip. He reports pain radiating to the groin and anterior thigh, which worsens with walking and internal rotation of the hip. On examination, there is restricted internal rotation and extension of the right hip. He has a positive FABER test. His ESR is 18 mm/hr and CRP is 2 mg/L. X-ray of the pelvis shows joint space narrowing, osteophytes around the femoral head and acetabulum, and subchondral cyst formation. What is the most appropriate first-line management?

Explanation

## Management of Hip Osteoarthritis: Conservative First-Line Approach ### Clinical Diagnosis **Key Point:** This patient has primary hip osteoarthritis (OA), confirmed by: - Insidious onset with mechanical pain (groin, anterior thigh) - Restricted internal rotation and extension (classic hip OA pattern) - Positive FABER test (flexion-abduction-external rotation stress test) - Radiographic evidence: joint space narrowing, osteophytes, subchondral cysts - Normal inflammatory markers (ESR 18, CRP 2) — excludes inflammatory arthritis ### Management Algorithm for Hip Osteoarthritis ```mermaid flowchart TD A[Hip OA diagnosis]:::outcome --> B[Assess severity & functional impact]:::decision B -->|Mild to moderate| C[Conservative management]:::action B -->|Severe, refractory| D[Surgical intervention]:::action C --> E[Weight reduction + NSAIDs + Physiotherapy]:::action E --> F{Adequate symptom control?}:::decision F -->|Yes| G[Continue conservative care]:::action F -->|No after 3-6 months| H[Intra-articular steroid/HA injection]:::action H --> I{Sustained relief?}:::decision I -->|No| D I -->|Yes| J[Repeat as needed]:::action D --> K[Total hip arthroplasty]:::action ``` ### Why Conservative Management First? **High-Yield:** The stepwise approach to OA management follows a clear hierarchy: | Step | Intervention | Indication | |------|--------------|------------| | 1 | Weight loss, NSAIDs, exercise, physiotherapy | All patients with OA | | 2 | Intra-articular injections (steroid/HA) | Inadequate response to step 1 | | 3 | Total joint replacement | Severe, refractory disease with functional loss | **Clinical Pearl:** This patient is in the early-to-moderate stage of hip OA. He has not yet exhausted conservative options. Total hip arthroplasty is reserved for end-stage disease with severe functional impairment and failed conservative management. ### Components of First-Line Conservative Management 1. **Weight reduction:** Reduces mechanical load on the hip joint; even 5–10% weight loss improves symptoms. 2. **NSAIDs:** Reduce pain and inflammation; acetaminophen is an alternative for those who cannot tolerate NSAIDs. 3. **Physiotherapy:** Strengthens hip abductors and flexors, improves range of motion, reduces pain. 4. **Activity modification:** Avoid high-impact activities; encourage low-impact exercise (swimming, cycling). **Mnemonic: WANE** — Weight loss, Activity modification, NSAIDs, Exercise/physiotherapy. ### Why Not the Other Options? **Warning:** Jumping to surgical intervention (total hip arthroplasty) without exhausting conservative measures is premature and exposes the patient to unnecessary surgical risk. Prosthetic joints have a finite lifespan (15–20 years); younger patients should delay surgery as long as possible. **Key Point:** Oral corticosteroids and methotrexate are immunosuppressive agents used for inflammatory arthritis (RA, SLE), NOT for degenerative OA. This patient's normal inflammatory markers exclude inflammatory disease. ### Prognosis and Follow-Up **Clinical Pearl:** Many patients with hip OA achieve adequate symptom control with conservative management for years. If symptoms worsen despite conservative measures after 3–6 months, intra-articular corticosteroid or hyaluronic acid injection can be considered before resorting to surgery.