PATIENT EDUCATION
Metabolic Bone Disease
Metabolic bone disease is a broad term for disorders in which bone strength or mineralisation is affected by abnormalities in calcium, phosphate, vitamin D, hormones, nutrition, medicines or other medical conditions.
Select a topic below to view more information.
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Low Bone Density or Fracture at an Unusually Young Age
What you'll notice or feel
- A DXA scan reports unexpectedly low bone density.
- A fracture occurs after a minor injury or at a younger age than expected.
- There may be a history of repeated fractures or loss of height.
Common causes
- Osteoporosis or reduced peak bone mass.
- Secondary bone loss from endocrine disease, malabsorption, chronic illness or medicines such as glucocorticoids.
What it could be
- A metabolic or secondary cause of reduced bone strength that needs targeted investigation.
When to see a doctor
- There is a low-trauma fracture, repeated fracture or unexpectedly low bone density.
- Bone loss is occurring despite treatment.
Bone Pain, Muscle Weakness or Suspected Osteomalacia
What you'll notice or feel
- Diffuse bone discomfort, muscle weakness or difficulty rising from a chair.
- Walking may become uncomfortable in more severe disease.
- Blood tests may show vitamin D, calcium, phosphate or alkaline phosphatase abnormalities.
Common causes
- Vitamin D deficiency or impaired vitamin D metabolism.
- Low phosphate, malabsorption or other disorders of mineralisation.
What it could be
- Osteomalacia or another mineralisation disorder rather than osteoporosis alone.
When to see a doctor
- Symptoms persist despite routine vitamin D treatment.
- There are significant biochemical abnormalities or fractures.
Abnormal Calcium, Phosphate or Alkaline Phosphatase
What you'll notice or feel
- An abnormal result may be found incidentally on blood testing.
- Symptoms may be absent or may include muscle weakness, bone pain, kidney stones or fatigue depending on the cause.
Common causes
- Parathyroid, vitamin D, renal, liver or phosphate disorders.
- Some results reflect non-bone conditions and need interpretation in context.
What it could be
- A metabolic bone or mineral disorder requiring repeat or targeted testing.
When to see a doctor
- The abnormality is persistent, marked or associated with symptoms.
- There is a history of stones, fractures or kidney disease.
Medicines or Medical Conditions Affecting Bone
What you'll notice or feel
- Bone density may fall without obvious symptoms.
- A fracture may be the first sign of increased skeletal risk.
Common causes
- Long-term glucocorticoids and some other medicines can increase bone loss.
- Coeliac disease, inflammatory disease, endocrine disorders, chronic kidney or liver disease can affect bone.
Initial self-care
- Do not stop prescribed medicines suddenly because of bone concerns.
- Ensure adequate nutrition, appropriate activity and fall prevention while arranging assessment.
When to see a doctor
- Long-term treatment or chronic disease places you at increased fracture risk.
- A fracture occurs while taking a medicine known to affect bone.
Recurrent Fractures or Unexplained Skeletal Problems
What you'll notice or feel
- Several fractures occur with relatively modest trauma.
- There may be a family history of unusual fractures or bone disorders.
- Routine osteoporosis treatment may not fully explain the clinical picture.
What it could be
- A secondary or less common metabolic bone disorder.
- A genetic or systemic skeletal condition requiring specialist assessment.
When to see a doctor
- Fractures are recurrent, atypical or occur at an unexpectedly young age.
- There are unexplained biochemical or radiological abnormalities.
YOUR CONSULTATION
What to Expect at Your Visit
- Detailed fracture, nutrition, menstrual/menopause, medication and medical history.
- Review of previous DXA scans, X-rays and laboratory results.
- Targeted blood tests may include calcium, phosphate, vitamin D, renal function, thyroid and parathyroid assessment according to the clinical picture.
- DXA or additional imaging is arranged when it will change management.
- Treatment is directed at the underlying cause as well as fracture prevention.
- Complex cases may require coordination with renal, gastroenterology, rheumatology, orthopaedic or genetic services.
* IMPORTANT: A Note Before You Go
Metabolic bone disease is not synonymous with osteoporosis. Correct diagnosis matters because treatment depends on whether the main problem is bone loss, abnormal mineralisation, a mineral disorder or an underlying medical condition.
This page provides general educational information and cannot replace an individual medical assessment. If symptoms are persistent, worsening or concerning, arrange appropriate medical review.
NEED AN ASSESSMENT?
Arrange an Endocrinology Consultation
For non-emergency assessment or follow-up, appointments are booked through the hospital’s central appointment desk on 0422 432 4433. For severe or rapidly worsening symptoms, seek urgent medical care rather than waiting for a routine appointment.