Comparison of the Ultrasonography Features of the Breast in Women with Fibroadenoma and Those with Other Breast Lumps.

BACKGROUND: Fibroadenoma (FA) is documented as the most common benign breast disease typically presenting as a lump. A wide variety of other diseases including breast cancer can similarly present as lumps hence the need for further differentiation. Ultrasonography plays a vital role in the evaluation and treatment of breast lumps with histological analysis as the gold standard. OBJECTIVE: This study compared the physical and sonographic features of the breast in women with FA and women with breast lumps due to other diseases. MATERIALS AND METHODS: This is a single-centre comparative study. Clinical and sonographic breast evaluations of the recruited patients with lumps were done and reported using the American College of Radiology Breast Imaging Reporting and Data System score. The lumps were biopsied, and histological diagnosis was documented. Clinical and imaging features of the breasts of women with FA were then compared with those of women with lumps from other breast diseases, and collated data were analysed using SPSS Statistical version 23.0. RESULTS: Data from 118 subjects (59 in each group) were used for this study. There was a significant difference in the physical and sonographic appearance of FA concerning the patient's age, parity, change in lesion size, perilesional architecture, echogenicity, borders, capsule and background breast density. No FA was found in women with less dense breasts. CONCLUSION: The sonographic features of breasts showed some differences from the corresponding features of FA and other breast lesions. This has the potential to increase the efficiency of pre-operative diagnosis of FA and could be further applied in developing diagnostic criteria for FA in our environment.

Clinical study of ultrasound-guided minimally invasive catheterization combined with compound cortex phellodendri fluid in the treatment of lactational breast abscess.

OBJECTIVE: To retrospectively analyze the clinical practicability and value of ultrasound-guided minimally invasive catheterization combined with compound Phellodendron Phellodendri liquid in the treatment of breast abscess during lactation. METHODS: 139 patients with lactational breast abscess discharged from our hospital from January 2021 to November 2023 were selected. We divided them into groups according to treatment methods, analyzed whether there were statistical differences in observation indexes among groups and the risk factors affecting breastfeeding rate and treatment satisfaction. RESULTS: We found that numerical rating scale(NRS) score and incidence of breast fistula in group A were significantly lower than other, the continuous decrease of postoperative drainage in group A was higher than other, there were significant differences among groups (p<0.001). Univariate analysis showed that recovery time, drainage tube placement time, postoperative redness and swelling regression time, scar length, and VAS score of six groups were statistically significant (p<0.001). We found that the overall satisfaction and the rate of continued breastfeeding in group A (96.2%) were higher than other, the differences were statistically significant(p<0.05). Logistic regression analysis revealed that the significant risk factors influencing treatment satisfaction included the time of drainage tube placement, postoperative redness and swelling regression time, treatment group, surgical method, NRS score on the first day after operation, postoperative drainage volume, healing time, scar length, flushing drugs, and VAS score. Postoperative redness and swelling regression time, treatment group, operation method and VAS score are all risk factors that influence the outcome of breastfeeding. CONCLUSION: Ultrasound-guided minimally invasive catheterization combined with compound cortex phellodendri fluid in the treatment of breast abscess during lactation can not only reduce the pain caused by dressing change, but also offer numerous advantages, including shorter healing time, beautiful appearance, lower incidence of breast fistula, high satisfaction and high rate of continued breastfeeding.

Amyloidosis Found in the Breast: A Case Report.

BACKGROUND Amyloidosis results in fibrillar sheets of beta-pleated amorphous congophilic protein deposition in the extracellular space. Breast amyloidosis is a rare entity, with the first case reported in 1973 and only 2 major case series published since. These deposits can have local or systemic manifestations and typically present unilaterally, although bilateral involvement has been described. Some reported cases of amyloidosis have been linked to breast cancer. CASE REPORT The patient was a 60-year-old woman who presented to the breast surgery clinic for evaluation after image-guided biopsy of a right breast lesion. Core needle biopsy under stereotactic guidance demonstrated pathology consistent with nodular deposition of amyloid, associated with calcifications. Microscopic examination revealed extracellular deposition of acellular eosinophilic material in fat, stoma, and blood vessels. Congo red special stain was positive. Amyloid with Congo red special stain showed apple green birefringence under polarized light. Surgical excision under needle localization was performed, with the final surgical pathology report confirming amyloid deposits. CONCLUSIONS Breast amyloidosis can have calcium affinity, create a foreign body-like reaction with giant cell infiltration, and distribute through periductal, perivascular, or intralobar patterns. Some factors that can contribute to an increased risk or are associated with breast amyloidosis are predisposing clinical conditions, including autoimmune disease, various breast cancers, and B-cell lymphomas. Amyloidosis of the breast should be treated either as primary or secondary, based on etiology. Further studies need to be conducted on whether there are specific genetic markers that predispose populations to the development of amyloidosis of the breast.

[Angiomatosis of the breast: a clinicopathological analysis of six cases].

Objective: To investigate the clinicopathological features and differential diagnosis of breast angiomatosis. Methods: Six cases of breast angiomatosis diagnosed at the Department of Pathology, the Seventh Medical Center, People's Liberation Army General Hospital and the Department of Pathology, Dongzhimen Hospital, Beijing University of Chinese Medicine from January 2011 to December 2023 were evaluated and reviewed. Results: All patients were female with an average age of 46 years at presentation, ranging from 25 to 62 years. The most common clinical presentation was a palpable unilateral breast mass with diameter ranging from 7 to 14 cm, and the average size was 11 cm. Histologically, all cases were composed of variably-sized ectatic, thin-walled blood vessels with minimal to no apparent smooth muscle, lined by flat normochromic endothelium without atypia, and diffusely infiltrating the breast stroma. Where present, the lesional vessels infiltrated between and around terminal duct lobular units but not into individual intralobular stroma. Immunohistochemical staining for CD31, CD34, Factor Ⅷ, Fli-1 and D2-40 revealed positive expression in vascular and/or lymphatic endothelial cells. Additionally, the Ki-67 proliferation index was found to be less than 1%. Conclusions: Angiomatosis of the breast is a rare benign vascular lesion. Distinguishing it from low-grade angiosarcoma requires careful consideration of the growth pattern, atypical features, and Ki-67 proliferation index.

Diabetic mastopathy: about two cases.

Diabetic mastopathy is a rare and benign pathology affecting young individuals with type 1 diabetes or autoimmune diseases. It clinically resembles breast cancer, necessitating a histological examination for a definitive diagnosis. These cases underscore the diagnostic challenges and the importance of histological examination. This report details two cases of diabetic mastopathy at Mohammed VI Hospital in Marrakech. The first case involved a 35-year-old with type 1 diabetes and mastodynia, revealing a 4 x 3 cm nodule in the left breast. Biopsies confirmed fibrous breast tissue with lymphocytic infiltrates, characteristic of diabetic mastopathy, with no recurrence during follow-up. The second case featured a 38-year-old with trisomy 21 and type 1 diabetes presenting with a right breast abscess. Drainage revealed lymphocytic infiltrates, confirming diabetic mastopathy. Though diagnostically challenging, diabetic mastopathy lacks a direct link to breast cancer. Long-term cancer risks in affected patients mirror the general population.

Papillary endothelial hyperplasia (Masson's tumor) of the breast: A diagnostic challenge.

Papillary endothelial hyperplasia (PEH) or Masson's tumor is a rare benign vascular tumor that usually appears in the soft tissues of the head and neck, trunk and extremities, being extremely rare in the breast. Its diagnosis can be a challenge, especially in the follow-up of patients with previous disease of breast carcinoma. We present the case of a 65-year-old patient, with a history of bilateral breast cancer and reconstruction with implants, who presented a Masson's tumor during follow-up. An ultrasound scan was performed, showing a well-circumscribed mass in the left breast, located in the posterior contour of the implant. Subsequently, magnetic resonance imaging (MR) depicted an enhancing tumor, without infiltration of adjacent structures. Finally, the definitive anatomopathological diagnosis was obtained after surgical excision.

Diagnostic Accuracy of Mammographic Findings in Patients 35 Years and Older Presenting with Palpable Breast Lump in University of Benin Teaching Hospital, Benin City.

BACKGROUND: Mammography has become an invaluable tool for diagnosing breast lesions and detecting early breast cancer in women of 35 years and above. AIMS: To correlate the mammography Breast Imaging Reporting and Data System (BI-RADS) categories with the histology in breast lesions and to determine the predictive values, sensitivity, specificity and accuracy of mammography. PATIENTS AND METHOD: This was a one- year prospective study carried out from March 2015 to February 2016. Consecutive female patients of 35 years and above with breast lesions at the University of Benin Teaching Hospital, Benin-City were recruited. Patients with fungating breast lesions and those who declined recruitment were excluded. All patients had mammography and core biopsy of the breast lesion which was examined histologically. RESULTS: A total of 101 patients were studied. Five patients had bilateral breast lesions making a total of 106 biopsies that were performed. The mean age of patients with benign breast disease was 47.0 ± 4.9 years while those with malignant breast disease was 49.9 ± 8.5 years; P-value was 0.080 which was not statistically significant. Fibrocystic disease 6 (5.6%) was the most common benign disease while invasive ductal carcinoma was the most common malignant breast disease 84(79.2%). BI-RADS 5 correlated mostly with malignant breast disease (97.0%); P value < 0.001 and was statistically significant. CONCLUSION: This study showed that mammography is useful in the diagnosis of breast lesions in women who are 35 years and older. Patients with BI-RADS category 3, 4 and 5 had an increasing correlation with malignant breast disease.

CONTEXTE: La mammographie est devenue un outil inestimable pour diagnostiquer les lésions mammaires et détecter précocement le cancer du sein chez les femmes de 35 ans et plus. OBJECTIFS: Corréler les catégories du Breast Imaging Reporting and Data System (BI-RADS) de la mammographie avec l'histologie des lésions mammaires et déterminer les valeurs prédictives, la sensibilité, la spécificité et la précision de la mammographie. PATIENTES ET MÉTHODE: Il s'agit d'une étude prospective d'un an réalisée de mars 2015 à février 2016. Les patientes consécutives de 35 ans et plus présentant des lésions mammaires à l'Hôpital Universitaire de Benin, à Benin-City, ont été recrutées. Les patientes présentant des lésions mammaires fungiques et celles qui ont refusé de participer à l'étude ont été exclues. Toutes les patientes ont subi une mammographie et une biopsie au trocart de la lésion mammaire, qui a été examinée histologiquement. RÉSULTATS: Un total de 101 patientes ont été étudiées. Cinq patientes présentaient des lésions mammaires bilatérales, soit un total de 106 biopsies réalisées. L'âge moyen des patientes atteintes de maladie mammaire bénigne était de 47,0 ± 4,9 ans, tandis que celui des patientes atteintes de maladie mammaire maligne était de 49,9 ± 8,5 ans ; la valeur P était de 0,080, ce qui n'était pas statistiquement significatif. La maladie fibrokystique 6 (5,6%) était la maladie bénigne la plus fréquente, tandis que le carcinome canalaire infiltrant était la maladie mammaire maligne la plus fréquente 84 (79,2%). Le BIRADS 5 corrélait principalement avec les maladies mammaires malignes (97,0%) ; la valeur P était < 0,001 et était statistiquement significative. CONCLUSION: Cette étude a montré que la mammographie est utile dans le diagnostic des lésions mammaires chez les femmes de 35 ans et plus. Les patientes ayant des catégories BI-RADS 3, 4 et 5 présentaient une corrélation croissante avec les maladies mammaires malignes. MOTS-CLÉS: Mammographie, Lésion mammaire féminine, Histologie, Corrélation, Précision diagnostique.

A gel plaster in the form of nipple cover: A comfortable and safe transdermal delivery method for mammary hyperplasia.

Hyperplasia of mammary glands (HMG) is considered a precancerous condition with a risk of malignant transformation, highlighting the necessity of proactive treatment in the early stages. Transdermal drug delivery offers significant advantages such as painlessness, absence of first-pass effect, and good patient compliance. However, the unique structure of the breast requires transdermal formulations for treating mammary hyperplasia to exhibit higher levels of safety and comfort. We have formulated an ancient topical formula called 'Muxiang Bing,' comprising traditional Chinese medicines Aucklandiae Radix (AR) and Rehmanniae Radix (RR), for the treatment of HMG. This formula has been transformed into a gel paster in the form of nipple cover for trans-nipple-areola delivery. In our investigations, we observed that the optimal formulation of the Muxiang gel plaster demonstrated enhanced permeation facilitated by AR's effect on RR. Furthermore, pre-treatment with the Muxiang gel plaster improved mammary tissue morphology, hormone levels, oxidative stress, aberrant cell proliferation, and damage in rat models, thus preventing and ameliorating mammary hyperplasia. The Muxiang gel plaster exhibited low skin irritability in rats, and long-term use did not cause harm to their internal organs or blood cells, indicating its safety and efficacy.

Giant Myoid mammary hamartoma: A case report.

ABSTRACT: Mammary hamartoma are rare neoplasms of the breast. Myoid mammary hamartoma are a subtype comprising of prominent smooth muscle component along with normal breast tissue components including fibrous, adipose, and glandular tissue. We report the case of a 38-year-old lady who presented with a large 21 × 15 cm, firm, mobile lump in right breast, clinically mimicking as phyllodes tumor. The lesion was reported as BIRADS 4a on mammography. Fine needle aspiration cytology suggested benign breast disease. Wide local excision was performed. The excised lump was solid, gray-white with fatty yellowish areas. Histological features were of myoid mammary hamartoma. To the best of our knowledge, this is the largest myoid hamartoma reported till date. Fine needle aspiration, needle biopsy, and immunohistochemistry are of limited value as diagnostic modalities in these lesions. Complete surgical excision, proper identification, and follow-up is essential, as these lesions, more commonly those which are incompletely excised, can recur.

[Past and present of endoscopic surgery and robotic surgery in treatment of breast diseases].

Objective: To review the research progress related to endoscopic surgery and robotic surgery for breast diseases, aiming to provide references for clinical practice. Methods: The recent domestic and international literature on endoscopic surgery and robotic surgery for breast diseases was reviewed, then the challenges in their development, the innovative evolution of endoscopic surgery combined with clinical practice by our team, and its clinical applications were summarized. Results: Traditional endoscopic surgery, despite its advantages such as minimal invasiveness, good cosmetic outcomes, and high patient's satisfaction, has been limited in its development due to specific difficulties in establishing the operative field. Our team innovatively proposed the "reverse sequence method" and the Huaxi Hole 1 theory and methods, cleverly altering the surgical procedure sequence, adding small operative orifices to transform single-port operations into multi-port ones, effectively overcoming the challenges restricting the advancement of endoscopic surgery in the field of breast diseases, thereby enabling further proliferation of endoscopic procedures. In terms of breast endoscopic reconstruction surgery, the parachute patch technique has broadened the indications for reconstruction surgery, benefiting patients with a certain degree of breast ptosis; and the postoperative adjustment concept, through early intervention in the post-reconstruction breast shape, has further refined the reconstruction procedure. Robot-assisted surgery derived from endoscopic surgery theory has further enhanced the precision and stability of surgeries, reducing surgical risks; however, excessive time and economic costs are urgent issues that must be addressed. Conclusion: Through theoretical innovations, endoscopic surgery has been applied in the excision and reconstruction of breast lesions, while robotic surgery shows promising applications in autologous breast reconstruction, especially in the latissimus dorsi reconstruction field. Nevertheless, the lack of high-level large-sample, multi-center randomized controlled clinical trials to confirm its surgical safety, oncological safety, and postoperative cosmetic outcomes is an important direction for future research.

Tuberculosis of the breast: a rare extra-pulmonary presentation of tuberculosis.

INTRODUCTION: Breast tuberculosis (TB) is a rare extra-pulmonary presentation of tuberculosis. In the western world, this accounts for less than 0.1% of breast conditions (all breast conditions, not limited to TB or extra-pulmonary TB), but can be up to 3-4% in regions endemic for TB such as in Africa and Asia. CASE PRESENTATION: We report a case of a 54-year- old human immunodeficiency virus (HIV)-positive lady who presented with six months history of multiple masses on the left breast which were initially suspected to be cancer of the breast. However, histology report of the mass confirmed TB of the breast. CONCLUSIONS: Presentation of TB can be non-specific and atypical in patients with HIV infection, especially when it presents in extra-pulmonary forms.

Deep transfer learning for detection of breast arterial calcifications on mammograms: a comparative study.

INTRODUCTION: Breast arterial calcifications (BAC) are common incidental findings on routine mammograms, which have been suggested as a sex-specific biomarker of cardiovascular disease (CVD) risk. Previous work showed the efficacy of a pretrained convolutional network (CNN), VCG16, for automatic BAC detection. In this study, we further tested the method by a comparative analysis with other ten CNNs. MATERIAL AND METHODS: Four-view standard mammography exams from 1,493 women were included in this retrospective study and labeled as BAC or non-BAC by experts. The comparative study was conducted using eleven pretrained convolutional networks (CNNs) with varying depths from five architectures including Xception, VGG, ResNetV2, MobileNet, and DenseNet, fine-tuned for the binary BAC classification task. Performance evaluation involved area under the receiver operating characteristics curve (AUC-ROC) analysis, F1-score (harmonic mean of precision and recall), and generalized gradient-weighted class activation mapping (Grad-CAM++) for visual explanations. RESULTS: The dataset exhibited a BAC prevalence of 194/1,493 women (13.0%) and 581/5,972 images (9.7%). Among the retrained models, VGG, MobileNet, and DenseNet demonstrated the most promising results, achieving AUC-ROCs > 0.70 in both training and independent testing subsets. In terms of testing F1-score, VGG16 ranked first, higher than MobileNet (0.51) and VGG19 (0.46). Qualitative analysis showed that the Grad-CAM++ heatmaps generated by VGG16 consistently outperformed those produced by others, offering a finer-grained and discriminative localization of calcified regions within images. CONCLUSION: Deep transfer learning showed promise in automated BAC detection on mammograms, where relatively shallow networks demonstrated superior performances requiring shorter training times and reduced resources. RELEVANCE STATEMENT: Deep transfer learning is a promising approach to enhance reporting BAC on mammograms and facilitate developing efficient tools for cardiovascular risk stratification in women, leveraging large-scale mammographic screening programs. KEY POINTS: • We tested different pretrained convolutional networks (CNNs) for BAC detection on mammograms. • VGG and MobileNet demonstrated promising performances, outperforming their deeper, more complex counterparts. • Visual explanations using Grad-CAM++ highlighted VGG16's superior performance in localizing BAC.

Value of sonoelastography for diagnosis of breast non-mass lesions and comparison with BI-RADS: A systematic review and meta-analysis.

BACKGROUND: Not all the breast lesions were mass-like, some were non-mass-like at ultrasonography. In these lesions, conventional ultrasonography had a high sensitivity but a low specificity. Sonoelastography can evaluate tissue stiffness to differentiate malignant masses from benign ones. Then what about the non-mass lesions? The aim of this study was to evaluate the current accuracy of sonoelastography in the breast non-mass lesions and compare the results with those of the American College of Radiology breast Imaging-Reporting and Data System (BI-RADS). METHODS: An independent literature search of English medical databases, including PubMed, Web of Science, Embase & MEDLINE (Embase.com) and Cochrane Library, was performed by 2 researchers. The accuracy of sonoelastography was calculated and compared with those of BI-RADS. RESULTS: Fourteen relevant studies including 1058 breast non-mass lesions were included. Sonoelastography showed a pooled sensitivity of 0.74 (95% CI: 0.70-0.78), specificity of 0.89 (95% CI: 0.85-0.91), diagnostic odds ratio (DOR) of 25.22 (95% CI: 17.71-35.92), and an area under the curve of 0.9042. Eight articles included both sonoelastography and BI-RADS. The pooled sensitivity, specificity, DOR and AUC were 0.69 versus 0.91 (P < .01), 0.90 versus 0.68 (P < .01), 19.65 versus 29.34 (P > .05), and 0.8685 versus 0.9327 (P > .05), respectively. CONCLUSIONS: Sonoelastography has a higher specificity and a lower sensitivity for differential diagnosis between malignant and benign breast non-mass lesions compared with BI-RADS, although there were no differences in AUC between them.

Quality and readability of online information and materials on post-surgery breast seroma.

Aims/Background Seroma formation is the most common complication following breast surgery. However, there is little evidence on the readability of online patient education materials on this issue. This study aimed to assess the accessibility and readability of the relevant online information. Methods This systematic review of the literature identified 37 relevant websites for further analysis. The readability of each online article was assessed through using a range of readability formulae. Results The average Flesch-Reading Ease score for all patient education materials was 53.9 (± 21.9) and the average Flesch-Kincaid reading grade level was 7.32 (± 3.1), suggesting they were 'fairly difficult' to read and is higher than the recommended reading level. Conclusion Online patient education materials regarding post-surgery breast seroma are at a higher-than-recommended reading grade level for the public. Improvement would allow all patients, regardless of literacy level, to access such resources to aid decision-making around undergoing breast surgery.

Mammographic breast features and risk of cardiovascular diseases in korean women.

BACKGROUND: There is a growing amount of evidence on the association between cardiovascular diseases (CVDs) and breast calcification. Thus, mammographic breast features have recently gained attention as CVD predictors. OBJECTIVE: This study assessed the association of mammographic features, including benign calcification, microcalcification, and breast density, with cardiovascular diseases. METHODS: This study comprised 6,878,686 women aged ≥40 who underwent mammographic screening between 2009 and 2012 with follow-up until 2020. The mammographic features included benign calcification, microcalcification, and breast density. The cardiovascular diseases associated with the mammographic features were assessed using logistic regression. RESULTS: The prevalence of benign calcification, microcalcification, and dense breasts were 9.6 %, 0.9 % and 47.3 % at baseline, respectively. Over a median follow-up of 10 years, benign calcification and microcalcification were positively associated with an increased risk of chronic ischaemic heart disease whereas breast density was inversely associated with it; the corresponding aOR (95 % CI) was 1.14 (1.10-1.17), 1.19 (1.03-1.15), and 0.88 (0.85-0.90), respectively. A significantly increased risk of chronic ischaemic heart disease (IHD) was observed among women with benign calcifications (aHR, 1.14; 95 % CI 1.10-1.17) and microcalcifications (aOR, 1.19; 95 % CI 1.06-1.33). Women with microcalcifications had a 1.16-fold (95 % CI 1.03-1.30) increased risk of heart failure. CONCLUSIONS: Mammographic calcifications were associated with an increased risk of chronic ischaemic heart diseases, whereas dense breast was associated with a decreased risk of cardiovascular disease. Thus, the mammographic features identified on breast cancer screening may provide an opportunity for cardiovascular disease risk identification and prevention.

A survey of breastfeeding among women with previous surgery for benign breast disease: a descriptive exploratory study.

BACKGROUND: Surgery is the primary treatment for benign breast disease and causes some disruption to the normal physiology of the breast, even when this disruption is localised, it remains unclear whether it affects women's ability to breastfeed. There are only a few studies describing the experience of breastfeeding in women who have undergone benign breast disease (BBD) surgery. METHODS: We retrospectively analysed data from patients aged 20-40 years in Guangdong, China, who underwent breast lumpectomy for BBD in our department between 01 January 2013 and 30 June 2019, with a follow-up date of 01 February 2022. Patients were included who had a history of childbirth between the time of surgery and the follow-up date. By collecting general information about this group of patients and information about breastfeeding after surgery, we described the breastfeeding outcomes of women of a fertile age who had previously undergone surgery for benign breast disease. RESULTS: With a median follow-up of 5.9 years, a total of 333 patients met the inclusion criteria. From the breastfeeding data of the first child born postoperatively, the mean duration of 'exclusive breastfeeding' was 5.1 months, and the mean duration of 'any breastfeeding' was 8.8 months. The rate of 'ever breastfeeding' is 91.0%, which is lower than the national average of 93.7%, while the exclusive breastfeeding rate at six months was 40.8%, was higher than the 29.2% national average. The any breastfeeding rate at 12 months was 30.0%, which was well below the 66.5% national average. The common reason for early breastfeeding cessation was insufficient breast milk. A total of 29.0% of patients who had ever breastfed after surgery voluntarily reduced the frequency and duration of breastfeeding on the operated breast because of the surgery. CONCLUSIONS: There are some impacts of BBD surgery on breastfeeding and some may be psychological. Institutions should provide more facilities for mothers who have undergone breast surgery to help them breastfeed, such as conducting community education on breastfeeding after breast surgery, training professional postoperative lactation consultants in hospitals, and extending maternity leave. Families should encourage mothers to breastfeed with both breasts instead of only the non-operated breast.

Nonneoplastic and neoplastic sclerosing lesions of the breast.

Sclerosing lesions of the breast encompass a spectrum of benign and malignant entities and often pose a diagnostic challenge. Awareness of key morphologic features and pitfalls in the assessment of morphology and immunophenotype is essential to avoid over- or underdiagnosis and ensure optimal clinical management. This review summarizes nonneoplastic sclerosing lesions such as radial scar/complex sclerosing lesion, sclerosing adenosis, sclerosing intraductal papilloma, sclerosing variants of ductal adenoma and nipple adenoma, and fibroadenoma with extensive sclerosis, including their clinical presentation, characteristic morphology, differential diagnostic considerations, appropriate immunohistochemical work-up, when needed, and the clinical significance. In addition, atypical or neoplastic entities (such as atypical ductal hyperplasia, ductal carcinoma in situ, low-grade adenosquamous carcinoma, and fibromatosis-like metaplastic carcinoma) that can involve these sclerosing lesions are also briefly discussed.