Your ultrasound report has arrived in the portal. It says the liver shows “mildly increased echogenicity,” there is a “hypoechoic nodule” in the thyroid, the ovaries are “unremarkable,” and the radiologist “recommends clinical correlation.” Is that good? Bad? Both?
Radiology reports are written by physicians for physicians, in a vocabulary chosen for precision rather than comfort. Most of the frightening-sounding words are simply descriptions of how bright or how uniform something looked on the screen. This guide walks through how a report is structured, what the common terms mean in plain English, and which phrases deserve a follow-up question for your doctor.
First: how an ultrasound report is organized
Almost every report has the same four parts. Knowing the layout tells you where to look.
- Clinical information / indication. Why the scan was requested, in a few words (“right upper quadrant pain,” “palpable lump,” “screening”).
- Technique. What was scanned and how: transabdominal, transvaginal, with or without Doppler. Sometimes it notes limitations (“limited by bowel gas”).
- Findings. The long part. Each organ or structure is described in turn, usually in a fixed order. Normal organs get a short line; anything notable gets measurements and descriptive words. This is where the vocabulary lives.
- Impression. The radiologist’s summary and conclusion, often numbered. Read this first. It is what your doctor reads first, and it is where the radiologist says what matters and what, if anything, should happen next.
Brightness and texture words
On an ultrasound screen, tissue that reflects a lot of sound looks bright (white), tissue that reflects little looks dark, and fluid, which reflects almost nothing, looks black. Most of the “-echoic” words are just a precise way of saying where something sits on that scale compared with the tissue around it. None of them is a diagnosis on its own.
| Term | What it means |
|---|---|
| Anechoic | Black on the screen, because no echoes return. Almost always simple fluid: a simple cyst, urine in the bladder, blood inside a vessel, amniotic fluid. |
| Hypoechoic | Darker than the surrounding tissue. Describes brightness only. Many benign things are hypoechoic (lymph nodes, fibroids, some thyroid nodules, muscle), and so are some things that need follow-up; the other features in the report decide which. |
| Hyperechoic / echogenic | Brighter than surrounding tissue. Typical of fat, fibrous tissue, calcium, air, and some benign lesions such as liver hemangiomas and kidney angiomyolipomas. |
| Isoechoic | The same brightness as the surrounding tissue, which can make a structure hard to see; the radiologist may note it precisely because it was subtle. |
| Homogeneous | Even, uniform texture throughout. Generally what healthy organ tissue looks like. |
| Heterogeneous | Mixed, uneven texture. Common and often harmless (a heterogeneous thyroid is typical of thyroiditis; a heterogeneous uterus often reflects fibroids or adenomyosis). It is a descriptor, not a verdict. |
| Echotexture | The overall “grain” of an organ’s tissue, the background against which findings are described. |
| Increased echogenicity of the liver | The classic ultrasound description of fatty liver (hepatic steatosis). Extremely common; usually managed with lifestyle changes and blood work rather than more imaging. |
| Acoustic shadowing | A dark stripe behind something sound cannot pass through. The hallmark of a gallstone, kidney stone or calcification. |
| Posterior acoustic enhancement | Extra brightness behind a structure, which happens when sound passes easily through fluid. Supports the diagnosis of a simple cyst. |
| Artifact | A feature produced by the physics of scanning rather than by anatomy. Sonographers and radiologists recognize and discount these. |
Words that describe findings
| Term | What it means |
|---|---|
| Simple cyst | A thin-walled, fluid-filled sac with no internal echoes and no blood flow. Very common in the kidneys, liver, ovaries, breasts and thyroid, and almost always benign. Simple cysts typically need no follow-up. |
| Complex cyst | A cyst with internal echoes, thick walls, septations (internal dividing walls) or solid components. Not automatically concerning, but its features determine whether follow-up imaging is suggested. |
| Nodule | A small, discrete lump. The standard word for thyroid findings. Thyroid nodules are found in a large share of adults scanned, and the great majority are benign. |
| Lesion | A deliberately neutral word for any area that looks different from the normal tissue around it. It implies nothing about cause. |
| Mass | A space-occupying finding, solid or mixed. Describes size and form, not whether it is benign or malignant. Many masses are benign (fibroids, hemangiomas, lipomas, fibroadenomas). |
| Solid | Not fluid. Solid findings usually get more description (margins, vascularity, shadowing) because they have more possible causes than fluid. |
| Well-circumscribed / smooth margins | Clear, sharp borders. Generally a reassuring feature. |
| Irregular / ill-defined margins | Borders that are hard to trace. One of several features radiologists weigh when deciding whether further evaluation is needed. |
| Calcification | Bright calcium deposits, often with shadowing. Common with aging and in many benign conditions; the pattern (coarse vs. fine, rim vs. internal) matters more than the presence. |
| Vascularity / Doppler flow | How much blood flow a structure shows on color Doppler. “No internal vascularity” supports a cyst or inactive tissue; “internal vascularity” means the structure is living tissue with a blood supply, which includes many benign findings. |
| Free fluid | Fluid outside organs. A small amount in the pelvis is normal, especially around ovulation. Larger amounts prompt a search for a cause. |
| Lymphadenopathy | Enlarged lymph nodes. Most often reactive, meaning they are responding to infection or inflammation. |
| Gallbladder sludge | Thickened bile. Can cause gallstone-like symptoms and can resolve on its own. |
| Cholelithiasis | Gallstones. |
| Hydronephrosis | Swelling of the kidney’s drainage system because urine is backing up. Prompts a search for a blockage such as a stone. |
| Hemangioma | A common benign tangle of blood vessels in the liver, usually bright (echogenic). Often needs no follow-up at all. |
| Fibroid (leiomyoma) | A benign muscle growth in the uterus. Present in a large proportion of women; the report will note size and location. |
| Polyp | A small growth from a lining surface, such as the gallbladder wall or endometrium. Small ones are usually just monitored. |
| Incidental finding | Something noticed that has nothing to do with why you were scanned. Very common and usually benign. |
Measurements you may see
- Common bile duct (CBD) diameter: measured in millimeters. A dilated duct prompts a look for a blockage. The normal range widens with age and after gallbladder removal.
- Endometrial thickness: the lining of the uterus, in millimeters. Interpreted against where you are in your cycle or whether you are post-menopausal; the same number can be normal in one situation and worth checking in another.
- Post-void residual: how much urine stays in the bladder after you urinate. A key number in prostate and bladder evaluations.
- Crown-rump length (CRL): the length of an early pregnancy, used to establish the due date.
- Estimated fetal weight (EFW): a calculated estimate from several measurements, tracked over time rather than judged from one scan.
- Intima-media thickness (IMT): the thickness of the inner layers of the carotid artery wall, used as a marker of cardiovascular risk.
- Peak systolic velocity: a Doppler measurement of how fast blood is moving. Blood speeds up through a narrowing, so higher velocities help grade a stenosis.
Report phrases, decoded
| Phrase | What it usually means |
|---|---|
| Unremarkable | Normal. Nothing to report. This is the word you want to see. |
| Grossly normal / grossly unremarkable | Normal on overall inspection. “Grossly” means “as a whole,” not “very.” |
| Within normal limits (WNL) | A measurement that falls in the expected range. |
| No acute findings | Nothing that needs urgent action. Chronic or incidental things may still be listed. |
| Nonspecific | The finding does not point to one particular cause. Often paired with a suggestion to correlate with symptoms or labs. |
| Clinical correlation recommended | A routine instruction to your doctor to interpret the finding alongside your symptoms, exam and blood work. It appears in a huge proportion of reports and is not code for “something is wrong.” |
| Cannot exclude / cannot be excluded | The radiologist is acknowledging the limits of ultrasound: this test cannot rule the possibility out, so another test might be needed if the clinical picture warrants it. |
| Limited by bowel gas / body habitus | Part of the exam could not be seen well. The radiologist is telling your doctor which organs the report can and cannot vouch for. |
| Follow-up recommended in X months | The radiologist wants a recheck after a stated interval. The interval is your best clue to concern: a 6- or 12-month follow-up is routine surveillance of something that is probably benign. |
| Further evaluation with CT / MRI / biopsy recommended | Ultrasound answered part of the question; another test is needed to finish it. This is a next step, not a diagnosis. |
| Stable compared with prior | Unchanged from the previous study. For most findings, stability over time is strong reassurance. |
TI-RADS, BI-RADS and O-RADS: what the numbers mean
For three organs, radiologists use standardized scoring systems so that every report describes findings the same way. Each assigns a category based on the imaging features; the category expresses how much further evaluation is warranted, not a diagnosis.
- TI-RADS (thyroid). Nodules are scored on composition, echogenicity, shape, margins and echogenic foci, then placed in a category from TR1 (benign) to TR5 (highly suspicious). Whether a biopsy or follow-up is recommended depends on both the category and the nodule’s size; many TR3 and TR4 nodules are simply followed because they are below the size threshold.
- BI-RADS (breast). Categories run from 0 (incomplete, needs more imaging) through 1 (negative), 2 (benign), 3 (probably benign, short-interval follow-up), 4 (suspicious, biopsy recommended), 5 (highly suggestive of malignancy) and 6 (known cancer). A BI-RADS 3 finding has a very low likelihood of being cancer and is typically rechecked in six months.
- O-RADS (ovaries). A similar 0–5 scale for ovarian and adnexal findings, with O-RADS 1 and 2 covering normal ovaries and classic benign findings such as simple cysts.
What to do with your report
- Read the impression first. If it says normal or unremarkable, you can stop there.
- Circle any word you don’t understand in the findings, then look for it in this guide. Most will turn out to be descriptions, not diagnoses.
- Look for the verbs: “recommend,” “consider,” “follow-up.” Those are the action items.
- Bring three questions to your doctor: What does this finding most likely represent? Does anything need to be done, and when? What would you expect to see if it were something to worry about?
- Keep the report. Future scans will be compared with it, and “stable compared with prior” is the most reassuring sentence in radiology.
If you want to understand why the sonographer couldn’t talk you through any of this at the appointment, and how long reports take, we cover that in this article. If your report suggests a follow-up scan and you would rather not wait weeks for a slot, UltraVision Imaging performs most studies without a referral, at our private clinic or at your home, with a board-certified radiologist’s report typically within 24 hours. Enter your ZIP to see times, or call (916) 751-1944.
Frequently asked questions
What does hypoechoic mean on an ultrasound?
Hypoechoic means an area reflects fewer sound waves than the tissue around it, so it looks darker on the screen. It describes brightness only. Many benign structures are hypoechoic, including lymph nodes, fibroids and some thyroid nodules; the other features in the report determine whether any follow-up is needed.
What does heterogeneous mean on an ultrasound report?
Heterogeneous means the tissue has a mixed or uneven texture rather than a uniform one. It is a common and often harmless description; for example, a heterogeneous thyroid is typical of thyroiditis and a heterogeneous uterus usually reflects fibroids.
What does unremarkable mean in a radiology report?
Unremarkable means normal: the radiologist saw nothing worth remarking on. It is the word you hope to see.
What does “clinical correlation recommended” mean?
It is a routine instruction for your doctor to interpret the finding together with your symptoms, physical exam and lab results. It appears in a very large share of reports and does not mean something is wrong.
Does a hypoechoic nodule mean cancer?
No. Hypoechoic is a description of darkness on the screen, not a diagnosis. Radiologists weigh several features together, such as margins, shape, composition and calcifications, and use systems like TI-RADS to decide whether a nodule needs follow-up or a biopsy.
What does “follow-up recommended” mean?
The radiologist wants the finding rechecked after a stated interval to confirm it is stable. A 6- or 12-month interval is routine surveillance for something that is most likely benign. If an earlier recheck or a different test is wanted, the report will say so.
Should I worry about an incidental finding?
Usually not. Incidental findings, such as small simple cysts or a liver hemangioma, are noticed in a large proportion of scans and are typically benign. Your doctor will tell you whether anything needs to be followed.
This article is general health information, not medical advice. It does not replace a conversation with your own physician, who knows your history and can interpret results in context. If you have symptoms that worry you, contact your doctor; if you think you are having a medical emergency, call 911.