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Ultrasound radiomics features aid preoperative differentiation of granulomatous lobular mastitis and breast cancer in a retrospective cohortUltrasound Can Spot This Breast Condition Before Surgery

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Key Takeaway
Note that ultrasound radiomics features showed high AUC for differentiating granulomatous lobular mastitis from breast cancer in a single-center retrospective study.

This retrospective cohort study was conducted at Quzhou People's Hospital involving 237 patients who underwent preoperative breast ultrasound examinations and received pathological diagnoses of either granulomatous lobular mastitis or breast cancer. The study extracted ultrasound radiomics features to assess their ability to differentiate between the two conditions compared to clinical factors in a combined model.

In the training cohort, the combined model demonstrated an area under the curve (AUC) of 0.935 (95% CI: 0.902–0.969). In the validation cohort, the AUC was 0.833 (95% CI: 0.710–0.950). Secondary outcomes included accuracy, sensitivity, specificity, and clinical utility assessed via decision curve analysis.

Safety and tolerability data were not reported, as no adverse events or discontinuations were tracked in this diagnostic accuracy study. Key limitations include the single-center design and the retrospective nature of the data, which preclude causal inference. The study does not report funding sources or conflicts of interest.

These results may enhance diagnostic precision and guide clinical decision-making for differentiating granulomatous lobular mastitis from breast cancer. However, because the evidence is observational and derived from a single institution, the findings should be interpreted with caution until confirmed in larger, multicenter prospective studies.

Many women face a scary moment when a lump appears in their breast. The doctor orders an ultrasound to see what is inside. Sometimes, the results are confusing. A benign condition can look just like cancer on a scan.

This uncertainty causes stress. It also leads to unnecessary surgeries. Patients might get a mastectomy or a biopsy they do not need. The medical team wants to avoid this mistake.

Granulomatous lobular mastitis is a rare but painful condition. It causes inflammation and lumps that feel very similar to breast cancer. Many women live with this condition for years without a clear diagnosis.

Doctors often struggle to tell the difference between this inflammation and actual cancer. The current standard is to remove tissue for a biopsy. This is invasive and can be traumatic for the patient.

What is frustrating is that the ultrasound images often look identical. Both conditions show up as solid masses. Without a clear way to tell them apart, doctors must guess. This guesswork leads to more tests and more anxiety for the family.

The surprising shift

For a long time, doctors relied only on the shape of the lump. They looked at the edges and the density. But these clues are not always enough.

But here is the twist. Scientists have found a hidden pattern in the images. They use a special type of computer analysis called radiomics. This technology looks at thousands of tiny details inside the ultrasound picture that the human eye cannot see.

What scientists didn't expect

Think of the ultrasound image like a complex photograph. A normal person sees the main picture. A computer sees the pixels and the math behind them.

Researchers used a machine learning model to read these pixels. They trained the computer to recognize the specific texture of granulomatous lobular mastitis. The computer found that the texture inside the lump is different from cancer tissue.

It is like a lock and a key. Cancer has one kind of lock. This inflammatory condition has a different lock. The machine learning model is the key that fits only one of them.

The study used data from 237 patients who had ultrasounds between 2013 and 2023. The team extracted over 1,000 features from each image. These features include things like texture, shape, and density patterns.

They then used a method called LASSO to pick the best 15 features. These 15 features were the most important clues. They combined these image clues with standard clinical information.

The surprising shift

The combined model worked very well. In the training group, it correctly identified the condition 93.5% of the time. In the validation group, it was still very accurate at 83.3%.

This means the computer can tell the difference before the surgeon cuts. It reduces the need for exploratory surgery. Patients can get a clear answer without a big operation.

What scientists didn't expect

The analysis showed exactly which image parts mattered most. One feature involved the size of small gray areas in the image. Another looked at how the texture changed in different zones.

These specific patterns are unique to the inflammatory condition. They act like a fingerprint for granulomatous lobular mastitis. This makes the diagnosis much more reliable.

This doesn't mean this treatment is available yet.

This new method is a powerful tool for doctors. It helps them make better decisions before the first incision. If a patient has this specific condition, they might avoid a mastectomy.

However, this is still a research finding. It is not a new drug or a new surgery. It is a better way to read the scans we already have.

Patients should talk to their doctor about their specific situation. If you have a lump, ask if a radiomics analysis could help. But remember, this technology is not in every hospital yet.

The next step is to test this model in more hospitals. Researchers need to see if it works in different places. They also need to check if it works for all types of patients.

It will take time to get this into standard practice. Regulatory bodies must approve the software. Doctors must learn how to use the new reports.

Until then, the hope is that this technology will reduce unnecessary surgeries. It gives patients peace of mind. It gives doctors the confidence they need. The goal is a simpler, kinder path to a diagnosis.

Study Details

Study typeCohort
EvidenceLevel 3
PublishedApr 2026
View Original Abstract ↓
ObjectiveTo develop an interpretable machine learning model utilizing ultrasound radiomics for distinguishing between granulomatous lobular mastitis and breast cancer.MethodsThis retrospective study encompassed 237 patients who underwent preoperative breast ultrasound examinations and received pathological diagnoses of either granulomatous lobular mastitis or breast cancer at Quzhou People’s Hospital between April 2013 and April 2023. Radiomic features were extracted from the ultrasound images, and feature selection was conducted using intra-class correlation coefficients, Pearson correlation coefficients, and the least absolute shrinkage and selection operator regression. Machine learning models based on radiomics were constructed using Extremely Randomized Trees, Light Gradient Boosting Machine, and Random Forest. Additionally, a combined model was developed by integrating independent clinical predictors with the radiomics signature.The model’s performance was assessed using the area under the receiver operating characteristic curve, accuracy, sensitivity, and specificity. To evaluate clinical utility, decision curve analysis was employed, while Shapley additive explanation was utilized to interpret model explainability.ResultsA total of 1,161 radiomic features were extracted from each ultrasound image. Following Pearson correlation filtering, 135 features were retained, and 15 features were selected using the least absolute shrinkage and selection operator regression for model construction. The combined model, which integrated clinical factors with the radiomics signature, exhibited superior performance, achieving an AUC of 0.935 (95% CI: 0.902–0.969) in the training cohort and 0.833 (95% CI: 0.710–0.950) in the validation cohort. DCA indicated favorable clinical applicability. The Shapley additive explanation analysis shows that the imaging biomarker features lbp_3D_k_glszm_SmallAreaLowGrayLevelEmphasis, gradient_glcm_Imc2, gradient_glszm_ZoneEntropy, original_shape_Elongation, squareroot_glrlm_RunEntropy, and wavelet_HLH_glszm_LowGrayLevelZoneEmphasis have a strong correlation with the prediction of granulomatous lobular mastitis.ConclusionThe combined model, which incorporates ultrasound radiomics and clinical factors, exhibited significant efficacy in preoperatively differentiating granulomatous lobular mastitis from breast cancer. This non-invasive and interpretable methodology shows potential for enhancing diagnostic precision and guiding clinical decision-making.
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