What your MRI is actually telling you

An MRI that mentions a labral tear, cam morphology, pincer morphology or cartilage wear is describing what the radiologist can see on that scan; it is not, on its own, a verdict on why the hip hurts. The most useful first distinction is between a finding on imaging and a clinical diagnosis. Terms such as “labral tear”, “chondrolabral injury” or “paralabral cyst” are tissue findings. They may be relevant, but they do not automatically explain pain by themselves.

A 2024 review draws a helpful line between FAI and FAIS. FAI refers to abnormal contact between the femoral head-neck junction and the acetabular rim because of hip shape, typically cam and/or pincer morphology. FAIS is the syndrome diagnosed when that shape pattern matches the person’s symptoms and examination findings, with imaging used as support rather than as the whole diagnosis. A labral tear, by contrast, is damage to the fibrocartilage rim around the socket, so it describes tissue change rather than the underlying bony mechanics.

In practice, hip clinicians usually set the MRI beside the history, the physical examination and other imaging before deciding what is clinically meaningful. That is why reports can sound more alarming than the final diagnosis: words like “tear” or “cartilage loss” may be real scan findings, but they still need context before any treatment decision is made.

What FAI, FAIS and labral tear each mean

A hip report can bundle several ideas into one line. For example, “cam morphology with anterosuperior labral tear and adjacent chondral loss” is not one finding but three: the shape of the ball-and-socket, damage to the socket rim, and damage to the joint surface.

• “Cam morphology” means the femoral head-neck junction is not perfectly round, with reduced sphericity or extra bone where the ball meets the neck. In certain positions, that shape can abut the socket rim rather than gliding smoothly.
• “Pincer morphology” means the socket side contributes to the contact problem at the acetabular rim.
• “FAI” is often used loosely on scans as shorthand for that shape-related impingement pattern. The 2024 FAIS review uses FAIS more precisely for the syndrome in which imaging, symptoms and examination point in the same direction.
• The labrum is the fibrocartilage rim around the socket. A labral tear means that rim has been damaged. Repeated impingement can tear the labrum and damage nearby cartilage, including the chondrolabral junction.
• “Chondral loss”, “cartilage wear” or “chondrolabral injury” refer to damage at the smooth joint surface or where cartilage meets labrum. Those changes can sit alongside cam or pincer morphology in the same hip.

Taken together, the practical distinction is that cam and pincer describe shape, while labral and chondral terms describe the damage that shape may contribute to.

Why the scan may not match your pain

One awkward feature of hip MRI is that quite dramatic findings can appear in people who have no hip pain at all. In a 2012 asymptomatic-participant study, abnormalities were reported in 73% of hips and labral tears in 69%; a 2021 volunteer study still found labral tears in 52.8% of hips without symptoms. That does not make a reported tear meaningless, but it does mean the line “labral tear” is not automatic proof that it is the pain generator. In plain terms, pain is not always structural, and a structural finding is not always painful.

The same caution applies to shape-related findings such as cam morphology. In 2021, a study of 237 young adult football players found that a larger alpha angle was associated with labral tears and cartilage defects in players with pain and in some without pain. A 2025 meta-analysis also linked cam morphology, often defined by an alpha angle of 60° or more, with higher odds of radiographic hip osteoarthritis over 4–8 years. The practical point is that cam shape may be an important structural clue, and may matter over time, but it still does not confirm that today’s symptoms are coming from that finding alone.

Clinical pattern remains the tie-breaker. A 2024 FAIS review emphasised that symptoms, examination and imaging need to line up. That means the same MRI wording may carry different weight depending on the overall clinical picture.

How much detail the MRI can really show

Scan detail is often the reason a report sounds confident in one place and cautious in another. A routine non-contrast hip MRI can show overall joint structure, but small labral abnormalities can still be difficult to define cleanly on a standard study. That is why two reports may describe the same area slightly differently, especially if one scan is older, lower-resolution or affected by movement.

For labral tears, MR arthrography has traditionally been a little more sensitive because injected contrast outlines the joint surfaces and can make small separations easier to see. In a 2022 meta-analysis, MRI had summary sensitivity and specificity of 0.80/0.77, compared with 0.89/0.69 for MR arthrography. The same review found that modern 3.0 T MRI performed close to arthrography in many cases, so the better test is not always the one with dye; it often depends on the exact clinical question, local expertise and whether earlier imaging already exists.

As a result, wording such as “possible labral tear”, “suspected chondrolabral injury” or “degenerative signal” may reflect the limits of the scan as much as the hip itself. Those phrases usually mean some uncertainty remains, not that the finding is definitely major or definitely trivial.

What to do with the result

In practice, the next step after a hip MRI is usually a proper hip assessment rather than acting on the most striking line in the report. The 2024 review of femoroacetabular impingement syndrome emphasised that the diagnosis is made by lining up the history, examination, movement testing and imaging, not by treating the scan summary as a verdict on its own. That matters because the same report wording can mean different things depending on the symptom pattern and clinical context.

Even with an MRI already available, clinicians may still review plain X-rays or other imaging to better understand the underlying bony shape. MRI tends to show the soft-tissue side of the problem, while other imaging can help define the structural background.

The usual pathway is diagnosis first, then treatment matched to the findings. A 2023 review of non-operative management described conservative care as the starting point in many cases: typically tailored physiotherapy, activity or load modification, and sometimes selected injection support where the clinical picture justifies it. Surgery is not based on the words “labral tear” alone. It becomes a realistic option when symptoms remain limiting, the examination and imaging tell a consistent story, and a reasonable period of non-operative treatment has not been enough.

If symptoms are substantially interfering with walking, sleep, work or sport, the useful goal is a coherent diagnosis and plan rather than simply a more alarming label.

1. [1] Why Do We Focus on the Acetabular Labral Tear? You Can't See the Forest for the Trees. (2024). https://doi.org/10.1016/j.arthro.2024.10.052 https://doi.org/10.1016/j.arthro.2024.10.052
2. [2] Cam morphology is associated with MRI-defined cartilage defects and labral tears: a case–control study of 237 young adult football players with and without hip and groin pain. (2021). https://doi.org/10.1136/bmjsem-2021-001199 https://doi.org/10.1136/bmjsem-2021-001199
3. [3] The correlation between the labrum size and the labral tear in asymptomatic volunteers and symptomatic patients. (2021). https://doi.org/10.1186/s13018-021-02719-5 https://doi.org/10.1186/s13018-021-02719-5