Possible Occult Fracture
What is a possible occult fracture?
A fracture is a broken bone. Occult means hidden. An occult fracture is one that does
not appear well on an X-ray. A possible occult fracture is a suspected fracture that
needs to be confirmed with other imaging tests.
Occult fractures can occur because of a fall or other type of sudden (acute) injury.
They can also occur because of repetitive injuries or normal stresses on weak bones.
Fractures caused by repetitive injuries are fatigue fractures. Those that result from
normal stresses on weak bones are insufficiency fractures. Another name for these
fractures is stress fractures.
Common sites for occult fractures include the hip, shin, upper arm, and the bones
of the ankle, foot, wrist, and spine. Stress fractures are more common in the lower
part of the body than in the upper part. They are also more common in women than in
men. They often occur in athletes and military recruits.
What causes a possible occult fracture?
Accidents such as falls cause some occult fractures. The rest are caused by repetitive
activities or weakened bones.
Repetitive activities such as running, marching, and throwing can cause fatigue fractures.
These injuries often occur in people who suddenly increase their activity level. Their
actions cause tiny cracks in the bone. Normally, the bone is able to repair these
small fractures. But that requires time. When the activity continues or happens again
before the repairs are complete, these small fractures can add up to form a stress
fracture. In extreme cases, ongoing activities can cause sudden larger fractures.
Insufficiency fractures occur in weak bones. Bones can weaken enough that they cannot
withstand normal stresses caused by walking, twisting, or other low-impact activities.
Causes of weak bones include:
- Bone loss (osteoporosis)
- Genetic disorders such as osteogenesis imperfecta
- Rheumatoid arthritis
- Bone tumors
- Exposure to radiation or chemotherapy
- Long-term steroid use
- Kidney disease
Who is at risk for a possible occult fracture?
You may have an increased risk for occult fractures if you:
- Have a condition that weakens bones
- Are not physically fit
- Are a military recruit
- Engage in certain athletic activities
Sports that raise the risk for leg, ankle, and foot fatigue fractures include long-distance
running, track and field, basketball, football, soccer, and dance. Fatigue fractures
of the spine are more common in gymnasts, volleyball players, football players, dancers,
and cheerleaders. Shoulder and arm fatigue fractures can occur in pitchers, cheerleaders,
Other things that can raise your risk include:
- Being female
- Abnormal or absent periods (in women)
- Poor nutrition or eating disorders
- Chronic cough
- High arches or flat feet
- Previous stress fractures
- Having more than 10 alcoholic beverages a week
What are the symptoms of a possible occult fracture?
The most common symptom of an occult fracture is pain. You may notice that the pain
gets worse with activities and improves with rest. Even walking, or just putting weight
on your leg, may cause pain. If you have an occult fracture of your hip, you may not
be able to walk. Occult fractures typically cause pain in a specific area, rather
than pain that is widespread. You may feel a sudden increase in your pain if you develop
a larger fracture after continuing to put stress on the bone.
How is a possible occult fracture diagnosed?
Your healthcare provider will ask about your recent symptoms and your past health.
On exam, he or she may note a specific area of tenderness, pain with certain movements,
Your healthcare provider will send you for X-rays. The X-rays can show any sign of
a broken bone. If they look normal despite a suspected fracture, you will need repeat
X-rays in about 2 weeks or other imaging tests. These may include:
- CT scan
- Bone scan (bone scintigraphy)
Occult fractures often show up on MRI scans. But MRIs are expensive. They may also
take longer than other imaging tests and are not available everywhere. You cannot
have an MRI if you have a pacemaker.
Newer CT scans are an alternative to MRI scans. They are often a good choice when
you cannot have an MRI scan. Before the newer CT scans, healthcare providers often
used bone scans. Although occult fractures often show up on bone scans, it is hard
to find their exact location. Ultrasound is another option. The provider can quickly
do a scan with ultrasound.
How is a possible occult fracture treated?
The treatment of an occult fracture depends on where it is. Sometimes the combination
of rest with splinting or casting is enough. If you have an occult fracture of your
leg, ankle, or foot, you may need to use crutches to keep all of your weight off your
injury. Or you can use crutches to limit the amount of weight you put on it. You may
also need to wear a walking cast as it heals.
Your healthcare provider may refer you to a sports medicine doctor or an orthopedist
for treatment. That’s especially the case if you have an occult fracture of the spine,
hip, lower leg, ankle, or foot. Sometimes occult fractures need to be treated with
surgery. The bone can then be fixed with pins, screws, or metal plates.
Bones heal through a process of knitting. Cells within the bone lay down new bone
building blocks and remodel them until the bones become reconnected and strengthened.
This healing process may take several weeks to several months. Even after the bones
have started to heal, it still may be some time before they can handle the stresses
they used to.
When you have your cast or splint removed, you will probably find that your muscles
are weaker than they used to be. Once it is OK to resume activities, your healthcare
provider may send you to rehabilitation specialists. They can help you learn exercises
to rebuild your strength and flexibility and to prevent future fractures.
What are the complications of a possible occult fracture?
If your fracture is not diagnosed promptly and treated, the bone may not heal properly.
Sometimes complications occur even after proper treatment. Possible complications
of an occult fracture include:
- Chronic pain
- Death of bone because of decreased blood supply (avascular necrosis)
What can I do to prevent a possible occult fracture?
Accidents happen, but you can take certain precautions to lower your risk for accidents
and of injuries from accidents. You can also take precautions to reduce your risk
for stress fractures. Here are some things you can do to lower your risk:
- Eat a healthy diet that is rich in calcium and vitamin D.
- Wear properly fitting shoes with cushioned insoles. Replace them every 3 to 6 months.
- Increase your activity level slowly and take rest breaks.
- Cross-train and do strengthening exercises.
- If you have a risk of falling, install safety bars in your home.
- Remove tripping hazards.
- If you have a condition that weakens bones, talk with your healthcare provider about
ways to strengthen them.
When should I call my healthcare provider?
Call your healthcare provider if you:
- Have pain with activity that does not go away
- Have ongoing pain after an injury
- Have a sudden increase in your pain
Key points about a possible occult fracture
- A possible occult fracture is a suspected broken bone that does not show up on X-rays.
- Accidents, repetitive injuries, and normal stresses on weak bones can all cause occult
- The pain from occult fractures gets worse with activity.
- MRI is one of the best tools for diagnosing occult fractures. But it is not always
- Rest can help prevent and treat occult fractures.
Tips to help you get the most from a visit to your healthcare provider:
- Know the reason for your visit and what you want to happen.
- Before your visit, write down questions you want answered.
- Bring someone with you to help you ask questions and remember what your provider tells
- At the visit, write down the name of a new diagnosis, and any new medicines, treatments,
or tests. Also write down any new instructions your provider gives you.
- Know why a new medicine or treatment is prescribed, and how it will help you. Also
know what the side effects are.
- Ask if your condition can be treated in other ways.
- Know why a test or procedure is recommended and what the results could mean.
- Know what to expect if you do not take the medicine or have the test or procedure.
- If you have a follow-up appointment, write down the date, time, and purpose for that
- Know how you can contact your provider if you have questions.