X-ray of the sacrum and coccyx (lateral view)
This imaging test uses low-dose radiation to create detailed pictures of the bones in your lower spine (sacrum) and tailbone (coccyx). It helps assess fractures, dislocations, or other structural issues.
["An X-ray can detect problems in your lower spine that may not be painful but could affect movement or cause other symptoms."]
Key facts at a glance
- LOINC
- 98325-4
- Short code
- XR Sacrum+Coccyx Views Lat
- Synonyms
- XR Sacrum+Coccyx Views Lat
- Category
- chemistry
- Sample
- serum
- Container
- Red-top tube (SST)
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Method
- xr
- Specimen volume
- 5 mL
- Stability
- Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
- Hemolysis max
- 500
- Lipemia max
- 1000
- Icterus max
- 500
- TAT
- 4–24 hours
- Order
- routine
Why This Test Is Ordered
Your healthcare provider may recommend this X-ray if you have symptoms like back pain, numbness, or weakness in the lower body that could involve these bones. It’s also used before certain surgeries or treatments to plan care.
What to Expect During the Procedure
You’ll lie on your stomach on a padded table while an X-ray machine takes images from the side. A technician will position you carefully to capture clear views of the sacrum and coccyx. The procedure takes about 10–15 minutes and involves minimal discomfort.
Preparation and Safety
No special preparation is needed, but you may wear a hospital gown. If you’re pregnant, inform the technician immediately—this test uses radiation, which should be avoided during pregnancy unless absolutely necessary.
Possible Results and Next Steps
The X-ray images are reviewed by a radiologist, who will share findings with your doctor. Normal results show clear, intact bones. Abnormal findings might include fractures, degenerative changes, or other structural issues that could guide further testing or treatment.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
This test is critical for diagnosing conditions like sacral fractures (often from falls or trauma), coccygeal dislocations, or degenerative diseases like osteoarthritis. It may also help evaluate spinal alignment issues or prepare for surgical interventions.
Short name
Sacrum/Coccyx X-ray (Lateral)
Frequently asked questions
Will this test hurt?
How long will I need to wait for results?
Can I eat or drink before this test?
Sources
- 1
- 2Lab Tests OnlineSource
- 3
Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.
This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.
This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.
If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.
Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy