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# Describing a fracture on X-ray

- Reading

A fracture is described in a fixed order (which bone, where, the shape of the break and how far the pieces moved) so that anyone can picture it.

Updated Nov 13, 2026

## Key points

- Always two views at right angles; for shafts, the joint above and below.
- Order: bone, location, articular or not, pattern, displacement of the distal fragment.
- Displacement = translation, angulation, shortening, rotation.
- Open fracture and neurovascular status are clinical and come first in urgency.
- Minimal trauma or abnormal bone: think pathological fracture.

## What it is

A good fracture description lets a colleague picture the injury over the phone without seeing the film. It follows the same order every time: the patient and the study (side, views, date), the bone and the part of it (proximal, middle or distal third; epiphysis, metaphysis or diaphysis), whether the line enters a joint, the pattern of the line (transverse, oblique, spiral, comminuted, segmental, avulsion, impacted), and then the displacement of the distal fragment relative to the proximal one: translation, angulation, shortening and rotation. Last come what the film cannot show but the examination can: whether the skin is broken (open fracture) and whether nerves and pulses are intact. A fracture through abnormal bone (a lytic lesion, thin osteoporotic cortex) is called pathological and changes the work-up. At least two views at right angles are needed, because a fracture can be invisible or look undisplaced on a single view.

## What to check

- Two views at right angles (usually AP and lateral), including the joint above and the joint below for long-bone shaft fractures.
- Location: bone, side, which third or which part (epiphysis, metaphysis, diaphysis), and intra- or extra-articular.
- Pattern: transverse, oblique, spiral (twisting force), comminuted (three or more fragments), segmental, avulsion, impacted.
- Displacement is that of the distal fragment: translation (as a fraction of shaft width), angulation, shortening, rotation.
- A displaced fracture of one forearm or leg bone is often paired with a second fracture or a dislocation elsewhere in the ring.
- Healing shows as fading of the line and then callus bridging the gap over weeks; it is faster in children.

## Reading it step by step (and why)

- Check name, date, side marker and views — a perfect description of the wrong film or side is useless.
- Name the bone and the part (third, metaphysis, diaphysis) — location decides treatment and blood-supply risk.
- Say whether the line reaches a joint surface — intra-articular breaks need an anatomic reduction to limit arthritis.
- Describe the line: transverse, oblique, spiral, comminuted, avulsion — the pattern tells the force and stability.
- Give translation of the distal fragment as a share of shaft width — e.g. «50 % dorsal translation» is clear.
- Give angulation by the direction the distal fragment points (or the apex), and in degrees if measured.
- Note shortening (overlap) and rotation (compare the joints above and below) — both change limb function.
- Look at the joint above and below and the whole film for a second fracture or a dislocation.
- Look at the bone itself: thin cortex, a lytic area or a periosteal reaction suggest a pathological fracture.
- Add the clinical part: open or closed, distal pulses and nerves — they decide urgency more than the film.

| Word | What it means on the film |
| --- | --- |
| Transverse | Line roughly at right angles to the long axis; usually a direct blow |
| Oblique / spiral | Line slanted, or winding around the shaft; a spiral comes from twisting |
| Comminuted | Three or more fragments |
| Avulsion | A small piece pulled off where a tendon or ligament attaches |
| Impacted | One fragment driven into the other; the line may look dense instead of dark |
| Translation | Sideways shift of the distal fragment, as a share of shaft width |
| Angulation | Tilt between the fragments, named by apex or by distal-fragment direction |

## Common mistakes

- Ordering a single view: an undisplaced fracture may only show on the second view.
- Not imaging the joint above and below a shaft fracture, missing the paired dislocation.
- Mixing up the angulation convention: say whether you mean the apex or the distal fragment.
- Stopping at the first fracture: «satisfaction of search» hides the second injury.
- Calling a clinically suspected fracture «normal» on the first film; some (scaphoid, hip, stress) only show later or on MRI.
- Missing the soft-tissue clues: joint effusion, displaced fat pads, gas in the tissues (an open fracture).

## Next step

- Open fracture, absent pulse or a new nerve deficit: urgent orthopaedic call; the film can wait for none of these.
- Fracture through a joint or comminuted: CT helps plan surgery; discuss with orthopaedics.
- Strong clinical suspicion with normal X-ray: immobilize and repeat the X-ray in one to two weeks, or ask for MRI.
- Fracture through abnormal-looking bone or with minimal trauma: ask the radiologist and look for a pathological cause.
- After reduction: a new X-ray in two views to document the position.

## Memory aid

Rule of twos: two views, two joints, two sides when in doubt (children), two times (repeat later), two injuries (look for the second).

## Test yourself

Think of the answer, then tap the question to see it.

## Why are two views at right angles needed for every suspected fracture?

Because a fracture or its displacement can be invisible on a single view; the second view shows the plane the first one hides.

## In which fragment is displacement described by convention?

The distal fragment, relative to the proximal one: translation, angulation, shortening and rotation.

## What does a spiral fracture line suggest about the mechanism?

A twisting (rotational) force on the bone.

## What should you suspect when a fracture follows minimal trauma through thin or lytic bone?

A pathological fracture (osteoporosis, metastasis, primary bone tumour or infection); it needs further work-up.

[Add to my cards (4)](https://durgical.app/estudiar/?add=/en/radiology/describing-a-fracture-on-x-ray/)

## Elsewhere in DurgiPedia

- [Ottawa ankle and knee rules](https://durgical.com/en/clinical-exam/ottawa-ankle-and-knee-rules/)
- [Joint examination: inspection, palpation and range of motion](https://durgical.com/en/clinical-exam/joint-examination-inspection-palpation-and-range-of-motion/)

## Connections

## Related 6

- [Fractures in children: buckle, greenstick and the growth plate (Salter–Harris)](https://durgical.com/en/radiology/fractures-in-children-buckle-greenstick-and-the-growth-plate/)
- [Wrist and hand X-rays: distal radius and scaphoid](https://durgical.com/en/radiology/wrist-and-hand-x-rays-distal-radius-and-scaphoid/)
- [Hip X-ray: femoral neck fracture](https://durgical.com/en/radiology/hip-x-ray-femoral-neck-fracture/)
- [Shoulder and elbow X-rays: dislocation and the fat pad sign](https://durgical.com/en/radiology/shoulder-and-elbow-x-rays-dislocation-and-the-fat-pad-sign/)
- [Bone lesions: aggressive or not](https://durgical.com/en/radiology/bone-lesions-aggressive-or-not/)
- [The five densities on an X-ray](https://durgical.com/en/radiology/the-five-densities-on-an-x-ray/)

## Related conditions 4

- [Open fracture](https://durgical.com/en/conditions/open-fracture/)
- [Forearm fractures (both-bone, Monteggia, Galeazzi)](https://durgical.com/en/conditions/forearm-fractures/)
- [Tibial shaft fracture](https://durgical.com/en/conditions/tibial-shaft-fracture/)
- [Femoral shaft fracture](https://durgical.com/en/conditions/femoral-shaft-fracture/)

[← All of radiology](https://durgical.com/en/radiology/)

Educational content; it does not replace a radiologist's report and is not a clinical instruction. Each study is ordered on the patient's assessment and your institution's protocols.

Sources: [Fracture Healing Overview](https://www.ncbi.nlm.nih.gov/books/NBK551678/) (StatPearls (NCBI Bookshelf), 2026); [Elbow Fractures Overview](https://www.ncbi.nlm.nih.gov/books/NBK441976/) (StatPearls (NCBI Bookshelf), 2025).

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License: CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Cite as: DurgiPedia (durgical.com), https://durgical.com/en/radiology/describing-a-fracture-on-x-ray/