Osteoporosis is a huge topic for the UKMLA AKT, especially since it's so common in clinical practice. It’s essentially a "silent" disease until a fracture happens, so knowing how to screen and treat it is key.

Let's break this down into the three pillars you mentioned: assessment, diagnosis, and management.

1. FRAX Score: Risk Assessment

The FRAX (Fracture Risk Assessment Tool) is our go-to for calculating the 10-year probability of a major osteoporotic fracture.

• When to use it: In the UK (NICE guidelines), we usually perform a FRAX score for women >65, men >75, or younger patients with risk factors (like smoking, alcohol, or long-term steroid use).
• The Output: It gives you two percentages: one for a major fracture and one specifically for a hip fracture.
• The Result: Based on the NOGG (National Osteoporosis Guideline Group) graphs, it will tell you to:
  • Green: Reassure and give lifestyle advice.
  • Amber: Arrange a DEXA scan to refine the risk.
  • Red: Start treatment immediately (often without needing a DEXA if the risk is high enough).

2. DEXA Interpretation: The T-Score

The DEXA (Dual-energy X-ray Absorptiometry) scan measures Bone Mineral Density (BMD). For the AKT, you need to focus on the T-score, which compares the patient's bone density to that of a healthy young adult.

3. Treatment Options

Management is a mix of lifestyle changes and pharmacological intervention.

• Lifestyle: Weight-bearing exercise, smoking cessation, and reducing alcohol.
• Calcium & Vitamin D: Usually 800 units Vitamin D and 1000mg Calcium daily if intake is inadequate.
• First-line Pharmacotherapy: Oral Bisphosphonates (e.g., Alendronic acid 70mg once weekly or Risedronate 35mg once weekly).
  • Patient Education: Must be taken on an empty stomach, sat upright for 30 minutes with a full glass of water to prevent oesophageal ulcers.
• Second-line/Specialist: If oral bisphosphonates aren't tolerated, we look at IV Zoledronic acid (once yearly) or Denosumab (subcutaneous injection every 6 months).

I'll pull up some high-yield lessons and a quick comparison table to help you lock these details in for your revision.

I've pulled up the most relevant lessons on bone mineral density and osteoporosis to help you dive deeper into the specifics. I also added a quick comparison table for the main treatment options, as the AKT often tests the differences in administration and side effects between oral bisphosphonates and second-line biologics.

One high-yield tip for the AKT: Atypical femoral fractures and Osteonecrosis of the jaw are rare but classic exam-favorite side effects of long-term bisphosphonate use.

Would you like to try a few practice questions on this, or should we look at a flowchart for the management algorithm?