Radiology glossary

Fracture — What It Means on Your Report

Part of: Shoulder findings, explained

A bone appears to be broken or cracked.

In plain English: a broken bone.

What it means on MRI

MRI is the specialist's tool for fractures that X-ray misses or understates: stress fractures, tiny cracks in the bone, and fractures hidden by overlapping structures. It shows bone marrow edema — the bruise-like signal around a fresh break — which can reveal a fracture days before any crack is visible, and it shows the soft-tissue damage traveling with the break: torn ligaments, damaged cartilage, injured tendons. When pain persists despite a normal X-ray after injury, MRI is usually the next step. It is also used to check whether a known fracture is healing or whether the bone's blood supply is at risk.

What it means on CT

CT gives a detailed three-dimensional view of a fracture: exactly how the pieces sit, how many fragments there are, whether a joint surface is disrupted, and the precise measurements surgeons need for planning. It is the standard test for complex breaks — the wrist, ankle, shoulder, pelvis, and spine — where overlapping bones hide detail on X-ray. Three-dimensional reconstructions let the surgical team visualize the puzzle before operating. For straightforward fractures, CT is unnecessary; for complex ones, it is indispensable.

What it means on X-ray

Plain X-ray is the usual first test for a suspected fracture: fast, widely available, low-dose, and clear enough for most breaks. The report typically notes the bone, the fracture line's pattern and location, whether fragments are displaced, and whether a joint is involved. Standard practice includes two views from different angles, since some fractures hide on a single view. Limitations are real: subtle fractures can be invisible for a week or more until healing bone reacts, and complex joints need CT. But as the starting point, X-ray remains unmatched.

What it means on Ultrasound

Ultrasound is not the usual test for fractures in adults, though it can sometimes spot breaks in children — whose bones are more flexible — or cracks very near the surface. Its real value around an injury is soft tissue: showing bleeding, fluid collections, or tendon damage alongside the break. The fracture itself is diagnosed and followed with X-ray, CT, or MRI.

What radiologists look at next

For a fracture, the radiologist systematically documents the blueprint: which bone and exactly where along it, the fracture pattern and direction, whether the fragments are displaced and by how much, any rotation or shortening, whether the break enters a joint surface, and whether fragments threaten nearby nerves, vessels, or skin. They check for additional fractures — injuries often come in pairs — and assess the surrounding soft tissues for bleeding or damage. On follow-up studies they look for the signs of healing: blurring of the fracture line, bridging callus, and maintained alignment. Each detail is treatment-relevant, which is why fracture reports are among the most precise in radiology.

Where it commonly shows up

• clavicle
• humerus
• shoulder
• wrist
• ankle

Questions to ask your doctor

• How should the fracture at the affected area be treated?
• Is the fracture displaced, and what does that mean for healing?
• Does the break involve the joint surface?
• Will I need a cast, a sling, or surgery?
• How long does healing usually take, and when is the next X-ray?

Common questions

What is the difference between a fracture and a break?

Nothing — they are the same thing. “Fracture” is simply the medical word for a broken bone, whether it is a hairline crack or a complete break into pieces. The report will describe the pattern, location, and alignment — the details that actually determine treatment.

What does “nondisplaced” mean?

It means the bone is cracked but the pieces have stayed in their normal position — which is generally good news, since aligned bones heal more predictably and often need only immobilization. “Displaced” means the pieces have shifted, which sometimes must be put back in place, occasionally with surgery. Your doctor will explain which applies to you.

Why do I need a follow-up X-ray?

Follow-up images check that the bone is healing in good alignment, that any cast, splint, or hardware is doing its job, and that healing is progressing on schedule. Bone heals slowly — the first follow-up is often in one to two weeks — so the timing reflects biology, not bureaucracy. Ask what your doctor is looking for at each visit.

What is a stress fracture?

It is a tiny crack caused by repeated loading rather than a single injury — common in runners and military recruits, typically in the foot, shin, or hip. Stress fractures are often invisible on early X-rays and are usually diagnosed on MRI, which shows the bone's stress reaction. They are treated with rest from the offending activity rather than casting in most cases.

Related conditions

• Rotator Cuff Tear — What It Means on Your Report
• Edema — What It Means on Your Report
• Joint Effusion — What It Means on Your Report