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knee joint osteoarthritis X-ray AP lateral radiograph
Radiographic Analysis — Left Knee X-ray (AP & Lateral views)
Patient: Chougule Rekha | Study: Knee Joint AP/LAT | Date: 4/20/2026 | Institution: Joshi Hospital, Phaltan
Key Radiographic Findings
Analyzing both the AP (frontal) and lateral views of the left knee:
| Feature | Observation |
|---|---|
| Joint space | Visible narrowing, particularly in the medial tibiofemoral compartment on the AP view |
| Subchondral bone | Increased density (sclerosis) at the articular surfaces |
| Osteophytes | Marginal bony outgrowths visible at the femoral condyles and tibial plateau |
| Bone alignment | Slight varus angulation (bow-legged tendency) suggested on the AP view |
| Patellofemoral joint | Assessable on lateral view; possible posterior osteophyte at the tibial plateau |
| No acute fracture | No cortical disruption or acute fracture line identified |
| Bone density | Appears relatively preserved overall |
Most Likely Diagnosis
Knee Osteoarthritis (Gonarthrosis)
Kellgren-Lawrence Grade II–III (Moderate)
The combination of:
- Medial compartment joint space narrowing
- Subchondral sclerosis
- Marginal osteophyte formation
- No fracture or acute bony injury
...is classic for primary knee osteoarthritis, which is extremely common in middle-aged to elderly patients (especially women in South Asia).
Differential Diagnoses to Consider
| Diagnosis | Likelihood | Distinguishing Features |
|---|---|---|
| Osteoarthritis | ★★★★★ | Asymmetric JSN, osteophytes, sclerosis — all present |
| Post-traumatic arthritis | ★★★ | Same appearance; requires trauma history |
| Rheumatoid arthritis | ★★ | Typically symmetric, periarticular osteopenia, erosions — not prominently seen here |
| Calcium pyrophosphate deposition (CPPD) | ★★ | Look for chondrocalcinosis (calcification in menisci) |
| Gout | ★ | Soft tissue tophi, periarticular erosions — not seen |
Clinical Correlation Needed
To confirm and grade the diagnosis, the treating physician should assess:
- Symptoms: Pain (especially medial knee, worse on weight-bearing), morning stiffness < 30 minutes, crepitus
- BMI / age / activity level — major risk factors
- Standing weight-bearing X-ray for accurate joint space measurement
- MRI if meniscal pathology or ligamentous injury is suspected
⚠️ Disclaimer: This analysis is for educational purposes only. Final diagnosis and management must be made by a qualified orthopedic surgeon or radiologist who has examined the patient clinically.
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