Why Would You Need a Musculoskeletal Ultrasound Scan?

A musculoskeletal (MSK) ultrasound is a non-invasive imaging test that uses high-frequency sound waves to produce real-time images of your muscles, tendons, ligaments, joints, nerves, and soft tissues. If you’re experiencing pain, swelling, or mobility issues, your doctor might recommend this scan to better understand what’s going on inside your body.

What to Expect During (Musculoskeletal) MSK Ultrasound?

When you attend for your scan, you will be asked to lie down on the examination couch or position yourself to give the best access to the area to be scanned. The gel will be placed on the ultrasound probe (transducer) attached to the ultrasound machine. The probe emits high-frequency sound waves to generate the ultrasound image, which can be seen on the screen.

Why Should You Order an MSK Ultrasound?

An MSK ultrasound can be ideal to look for muscle, tendon and cartilage tears or inflammation. It can also identify fluid collections, bleeds within joints and sprains within joints.

1. Diagnosing Soft Tissue Injuries

MSK ultrasound excels at visualising soft tissues. It’s often used to detect:

• Muscle tears or strains
• Tendon injuries (like rotator cuff tears or Achilles tendinitis)
• Ligament sprains or tears (such as ankle or knee sprains)
• Bursitis (inflammation of fluid-filled sacs around joints)

It can clearly show the severity of an injury and help guide your treatment.

2. Identifying Chronic Conditions and Overuse Injuries

For athletes or individuals with repetitive strain injuries, MSK ultrasound can detect:

• Tendinopathies (chronic tendon wear and tear)
• Tennis elbow (lateral epicondylitis)
• Plantar fasciitis
• Carpal tunnel syndrome

The scan helps pinpoint what’s causing the discomfort and inflammation.

3. Evaluating Joint Problems

If you’re experiencing joint pain, stiffness, or swelling, an MSK ultrasound can:

• Detect joint effusions (fluid build-up)
• Diagnose synovitis (inflammation of the joint lining)
• Identify arthritis-related changes
• Spot cartilage damage in certain joints

It provides a clear picture of joint health without the need for invasive procedures.

4. Guiding Injections or Aspirations

When you need:

• A corticosteroid injection for pain or inflammation
• Platelet-rich plasma (PRP) therapy for healing
• Aspiration (removing fluid from a joint or cyst)

MSK ultrasound helps guide the needle to the exact location, making the procedure more accurate, effective, and safe.

5. Assessing Nerve Entrapments

If you have symptoms like tingling, numbness, or weakness, an MSK ultrasound can be used to:

• Examine nerve compression or entrapment (like carpal tunnel syndrome or ulnar nerve entrapment)
• Evaluate nerve injuries or inflammation
• Monitor nerve recovery after injury or surgery

6. Monitoring Healing and Recovery

After an injury or surgery, an MSK ultrasound can track your body’s healing progress by:

• Assessing tissue repair
• Monitoring inflammation reduction
• Checking the effectiveness of your rehabilitation or physical therapy plan

7. Spotting Masses or Lumps

If you have a lump, bump, or swelling under the skin, an MSK ultrasound can determine if it’s:

• A cyst
• A benign tumour (like a lipoma)
• A fluid collection (like an abscess or hematoma)

It helps your doctor decide on the next steps for treatment.

8. It’s Safe, Quick, and Non-Invasive

One of the best parts of MSK ultrasound is that:

• It’s radiation-free, unlike X-rays or CT scans.
• It’s painless and typically takes 15 to 30 minutes.
• You get real-time feedback—your doctor may even discuss the findings during the scan.

When Should You Consider It?

You may benefit from an MSK ultrasound if you have:

• Unexplained muscle or joint pain
• Swelling or stiffness
• Difficulty moving a joint or limb
• Persistent weakness, tingling, or numbness
• A lump that needs evaluation

When Would a Physician Order an MSK Ultrasound?

MSK Ultrasounds allow quick access to imaging, which can help to identify the cause of musculoskeletal pain. As it is a real-time scan, it can show fluid around a joint or conditions such as bursitis, which are better imaged when a joint can be moved during the scan.

• Tear in Ligaments: Ligaments tears can often be brought on with forceful or extreme movement, such as twisting. You may experience sudden pain or pop, resulting in instability of the area or joint affected. Tears in ligaments can be dynamically assessed on an ultrasound scan, often around the damaged area there will be inflammatory fluid and swelling.
• Bleeding in Muscles or Joints: Ultrasound scans can tell the difference between fluid (blood, water and effusion) and solids (muscle, tendons and fat). When bleeding occurs within a muscle or joint, due to injury, an ultrasound scan can identify that fluid accumulation and differentiate it from the normal solid tissue structures. Bleeding within muscles can cause the entire muscle to swell and the capsule within joints to swell then bleeding occurs there.
• Fluid Build-up: Fluids and solids appear differently during an ultrasound scan. Ultrasound scans can be used to help identify areas of fluid accumulation within the soft tissues, whether they are in the skin, joint or bursa (fluid-filled sac). Where this fluid is appropriate to drain, ultrasound can guide a needle to the exact point required to be able to drain the fluid away from the body. This can be carried out during the same diagnostic ultrasound is appropriate.
• Soft Tissue Tumours: Ultrasound can be used to diagnose soft tissue swelling below the skin, this can include the ability to differentiate between benign and malignant soft tissue tumours (cancers) due to the high level of detail and assessment of blood flow to soft tissue swellings.