How to read your MRI report — the words that matter · DiagnoHouse

An MRI report has a structure. Knowing it makes the difference between panicking at every word ending in "-oma" and walking into your doctor's appointment with sensible questions.

The structure of every MRI report

Most reports have these sections, in order:

Clinical history. What your doctor wrote on the referral.
Technique. Which sequences were run (T1, T2, FLAIR, diffusion, etc.).
Findings. The radiologist's systematic description of what they saw.
Impression (or "Conclusion"). The summary — usually 1–4 sentences.

Read the impression first. That's where the radiologist tells your doctor what they think matters. Then go back and read the findings if you want context.

Common words and what they mean

"Within normal limits" / "No abnormality detected" / "Unremarkable"

Good news. The radiologist saw nothing concerning.

"Hyperintense" and "hypointense"

These describe how bright (hyperintense) or dark (hypointense) something looks on a particular sequence. By themselves they don't mean disease — they tell the radiologist what tissue type they're looking at.

"Lesion"

A general word for any spot that looks different from the surrounding tissue. A lesion could be:

A tiny scar from an old injury
A cyst (fluid-filled, almost always harmless)
An area of inflammation
A tumour (rare)

The radiologist usually describes its size, location, and behaviour to help your doctor narrow down what it is.

"Cyst"

A small fluid-filled pocket. Most cysts found incidentally on MRI are harmless and need no treatment. Common in liver, kidneys, ovaries, breast — your doctor will say whether it needs follow-up.

"Disc bulge" vs "disc protrusion" vs "disc extrusion" (spine reports)

These describe how much a disc is sticking out of its normal space. Mild disc bulges are extremely common in adults over 30 and often cause no symptoms. The clinical question is whether the disc is pressing on a nerve — that's what determines treatment.

"Mild / moderate / severe"

Grading systems. The radiologist's threshold for "severe" depends on the specific finding. Always read this alongside the clinical context.

"Suggestive of..." / "Consistent with..." / "Likely..."

Phrases the radiologist uses to flag a probable diagnosis without claiming certainty. They mean: "this looks like X, but I can't prove it from imaging alone."

"Correlation with clinical findings recommended"

The radiologist is saying: "I see something. Whether it's the cause of your symptoms depends on what your doctor finds on examination."

"Follow-up recommended" / "Follow-up imaging in 6 months"

A finding that is probably benign but should be re-checked to confirm it isn't growing or changing.

Specific to brain MRI

"White matter hyperintensities" / "FLAIR hyperintensities" — small bright spots seen with age, headache history, or vascular changes. Very common after 50 and usually not serious.
"No mass effect" — there's no lesion pushing surrounding brain tissue. Good news.
"Ventricles are normal in size" — fluid spaces inside the brain look healthy.

Specific to spine MRI

"Loss of disc height" — degenerative wear and tear, normal with age.
"Modic changes" — bone marrow signal changes near degenerated discs. Common.
"Foraminal narrowing" — the bony opening where a nerve exits is narrowed. May or may not cause symptoms.
"Cord signal is normal" — the spinal cord itself looks healthy.

Specific to joint MRI (knee, shoulder)

"Tear" — ligament or cartilage is broken. The radiologist usually grades it (partial vs complete).
"Effusion" — fluid in the joint. Suggests recent inflammation or injury.
"Bone marrow oedema" — swelling within the bone, often from recent stress or injury.

What NOT to do with your report

Don't Google individual phrases. Out of context, every medical term sounds alarming. The radiologist read your scan as a whole; the report should be read as a whole.
Don't compare your report to a friend's report. Same words can mean different things in different bodies and clinical contexts.
Don't assume "needs follow-up" means cancer. It almost always means "let's confirm this is stable."
Don't skip the doctor visit because the impression sounds reassuring. Your doctor connects the imaging to your symptoms and decides whether and how to act.

When to push back

If your report says something serious and you can't get an appointment with your doctor for a few days, WhatsApp us — we'll review the report with our radiologist and tell you whether it warrants urgent attention or can wait. No charge for existing DiagnoHouse patients.