Arthrogram

Overview

An arthrogram is a type of scan that gives doctors a much clearer picture of the inside of a joint, such as your knee, shoulder, hip or wrist. First, a small amount of a special dye (called contrast) is injected into the joint space. The dye 'lights up' the soft parts of the joint — the cartilage, ligaments and joint lining — which normal X-rays cannot show well. Straight afterwards you have a scan, usually an MRI, sometimes a CT scan or X-ray, and the pictures show the joint in fine detail. An arthrogram is a test, not a disease, and it does not treat anything itself. It simply helps your doctor work out what is going on so the right plan can be made.

Yes. Arthrograms are a routine, well-established test carried out in hospital imaging (radiology) departments every day. Millions of joint scans are done worldwide each year, and the injection part is very similar to other common joint injections.

Anyone can be referred for an arthrogram, from teenagers with a sports injury to older adults with ongoing joint pain. It is most often used in adults with knee, shoulder or hip problems, and in children it is sometimes used to check how the hip joint is developing.

Symptoms

Common symptoms

• Joint pain that has lasted weeks or months, especially if an X-ray looked normal
• A joint that catches, locks, clicks or feels unstable
• Swelling or stiffness in a joint after an injury
• Pain that limits sport, work or everyday movement
• A joint that still hurts after surgery, where the surgeon needs to check the repair

Symptoms in children

• A hip that seems stiff, or a limp, which may need closer imaging
• Joint pain after a fall or sports injury
• Being referred by a children's bone specialist (orthopaedic doctor) for extra detail before planning treatment

Symptoms in older adults

• Long-standing shoulder or hip pain, often with wear and tear (osteoarthritis)
• A suspected tear in the rotator cuff (the muscles and tendons around the shoulder)
• Pain after a joint replacement that needs checking
• More caution is taken if you have kidney problems, diabetes or take blood-thinning medicines — your team will discuss this with you

Causes

Main causes

• An arthrogram is requested to look for the cause of joint symptoms — not caused by them. Common reasons include torn cartilage or ligaments, a torn rotator cuff in the shoulder, loose fragments of bone or cartilage floating in the joint, or problems with the joint lining.
• It is also used to check whether a previous joint operation or repair has healed properly.
• Sometimes it is used when a standard MRI or X-ray has not given a clear answer.

Risk factors

• Known allergy to contrast dye or to iodine
• Kidney problems, which can affect how well the body clears contrast dye
• Pregnancy or possible pregnancy — tell the team before the appointment
• Taking blood-thinning medicines, which can increase bruising or bleeding
• An infection or skin problem near the joint being injected
• Feeling very anxious in enclosed spaces (claustrophobia), if an MRI is planned

When to see a doctor

See a doctor urgently if:

• Fever, spreading redness or increasing pain and swelling around the injection site after your arthrogram
• Any sign of an allergic reaction that is not severe — such as an itchy rash, mild hives or feeling generally unwell
• New numbness or weakness in the limb that was injected

Book a routine appointment if:

• Ongoing joint pain, swelling, clicking or instability that is not improving
• Pain that stops you doing sport, work or daily tasks
• Questions about your arthrogram results or what happens next
• Worry or anxiety about your joint problem or the test

Diagnosis

Your doctor will first ask about your symptoms and examine the joint. They may arrange simpler tests first, such as a plain X-ray or an ultrasound. An arthrogram is offered when those tests do not give enough detail, or when your doctor needs to see the soft tissues of the joint very clearly before deciding on treatment.

Tests that may be done

• A physical examination of the joint, checking movement, strength and stability
• Plain X-ray — good for bones but limited for soft tissue
• Ultrasound scan
• Standard MRI or CT scan
• The arthrogram itself — contrast dye injected into the joint, followed by MRI, CT or X-ray pictures
• Sometimes a small sample of joint fluid is taken at the same time to check for infection or inflammation
• Keyhole surgery (arthroscopy) may be used later if a repair is needed

What to expect at your appointment

You will usually be seen in the hospital imaging department as a day patient. You may be asked not to eat or drink for a few hours beforehand, and to arrange a lift home. You lie on a couch and the skin over the joint is cleaned. The skin is numbed with a small injection, then the doctor guides a thin needle into the joint using X-ray or ultrasound to see exactly where it is. The contrast dye is injected, and you may feel a cool feeling or mild pressure. The needle is removed and a small dressing applied. You then go to the scanner, which is painless but can be noisy and takes around 15 to 30 minutes. You can usually go home soon afterwards. Results go to the doctor who referred you, and you will normally hear back within one to two weeks.

Treatment

An arthrogram does not treat your joint — it gives information. The treatment that follows depends entirely on what the scan shows. Many joint problems get better with physiotherapy, activity changes and simple pain relief, while some tears or injuries may need surgery. Your doctor will talk through the options with you once the results are back.

Self-care at home

• Rest the joint for about 24 hours after the injection and avoid heavy lifting or strenuous sport for one to two days
• Keep the small dressing on for the time your team advises, and keep the area clean and dry
• An ice pack wrapped in a cloth for 10 to 15 minutes can ease tenderness
• Gentle movement helps stiffness — try not to keep the joint completely still for long
• Follow any physiotherapy exercises your team has given you

Medical treatments

Treatment is planned around your scan results and your goals. Options include physiotherapy to strengthen the muscles around the joint and improve movement, activity modification, and simple pain relief recommended by your doctor or pharmacist. Some people benefit from an anti-inflammatory medicine injected into the joint by a specialist, or from a joint support or brace. If the scan shows a tear, a loose fragment or damage to the cartilage, your doctor may discuss keyhole surgery or a repair. Your healthcare team will explain the benefits and risks of each option so you can decide together.

When is surgery considered?

Surgery is only considered if the arthrogram shows a problem that is likely to improve with an operation — for example a torn ligament or tendon, a loose piece of bone or cartilage, or a joint that keeps dislocating. Many people do well without surgery, so your doctor will weigh up your symptoms, age, general health and what matters to you.

Living with this condition

While you wait for results and treatment, it helps to keep the joint moving gently rather than resting it completely. Pace yourself, break tasks into smaller steps, and use aids such as a rucksack or a trolley if carrying things is painful. Keep a note of when pain is worse and what helps — this is useful information for your appointments.

Lifestyle tips

• Stay active in ways that do not strain the sore joint, such as swimming, cycling or walking on flat ground
• Build strength gradually with the exercises your physiotherapist recommends
• Aim for a healthy weight, which reduces load on hips and knees
• Protect your joints during sport — warm up, use good technique and the right footwear
• Get enough sleep, as tiredness makes pain feel harder to cope with
• Avoid smoking, which slows healing and is linked with poorer joint health

Diet and exercise

There is no special diet for joint problems, but a balanced diet with plenty of vegetables, fruit, wholegrains and protein supports general health and healing. Oily fish, nuts and seeds provide healthy fats. Exercise is one of the best things you can do for a painful joint: start gently, build up slowly and stop if pain sharply increases. A physiotherapist can design a safe programme for you.

Mental health and emotional wellbeing

Waiting for scan results and living with joint pain can be worrying, frustrating and tiring. It is very common to feel low or anxious, especially if pain is stopping you doing things you enjoy. Talking to a friend, family member or your GP helps. If low mood or worry is affecting your sleep, work or relationships, tell your doctor — support such as talking therapies is available. If you ever feel unable to cope or have thoughts of harming yourself, contact your local emergency number or a crisis line in your country right away.

Prevention

You cannot prevent needing an arthrogram — it is a test, not an illness. What you can do is reduce the chance of joint injuries and keep your joints healthy: warm up before exercise, build strength around your joints, avoid sudden increases in training, use proper footwear and protective gear, and keep to a healthy weight.

Screening programmes

There is no screening programme for joint problems. If you have ongoing joint pain, stiffness or instability, see your doctor so it can be assessed early.

Complications

If left untreated

• If joint symptoms are not investigated, a tear or injury may be missed and could get worse over time
• Ongoing pain can lead to muscle weakness and stiffness around the joint
• Everyday activities, work and sleep may become harder
• The arthrogram itself carries small risks: bruising or brief pain at the injection site, a temporary feeling of fullness in the joint, and, rarely, infection or an allergic reaction to the contrast dye

Long-term outlook

For most people an arthrogram is quick and causes few problems, and the information it gives is very valuable. Many joint problems can be treated successfully with physiotherapy, activity changes or, where needed, surgery. Whatever your results show, your healthcare team will be there to explain the options and support your recovery.

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