Malignant adenomyoepithelioma of the breast: A case report

Benign Adenomyoepithelioma of the Breast: A Case Report and Review of Imaging Features

Adenomyoepithelioma (AME) of the breast is a rare tumor that can be benign or malignant and has varied morphological features. We report a case of a 62-year-old female with a history of right breast cancer who presented with abnormal screening mammography. The detection, presentation, and varied imaging characteristics of AMEs are discussed. The nonspecific imaging and histologic appearance of AME are highlighted, emphasizing the need for representative biopsy samples and histopathological review for diagnosis. Our case underlines the importance of wide surgical excision with negative margins in the presence of diagnostic uncertainty, which corresponds with the current recommended treatment for AME to prevent recurrence.

Breast adenomyoepithelioma from a radiologic perspective

Adenomyoepithelioma of the breast (AB) is an uncommon tumor that is characterized by the biphasic proliferation of epithelial and myoepithelial cells. The radiologic findings for AB have been scantly reported. This paper aims to analyze the characteristic findings for AB on ultrasonography (US) and mammography. This retrospective descriptive study used the Breast Imaging-Reporting and Data System (BI-RADS) to analyze the US and mammography findings for histologically confirmed AB in patients attended at our institution between 2007 and 2019. We identified a total of 13 AB in 13 women. All patients underwent US. On US, 12 lesions were seen as oval nodules, and the remaining lesion was irregular-shaped; 8 lesions had circumscribed margins, 3 had angled margins, and 2 had microlobulated margins. Regarding the echo pattern, 8 lesions were hypoechoic and 5 were complex (solid-cystic). On color Doppler, 11 lesions were vascularized nodules and 2 were avascular nodules. In conclusion, we present the imaging characteristics for a series of cases of AB. It is unlikely that this lesion can be suspected solely on the basis of the imaging findings; nevertheless, it is important for radiologists to be familiar with AB to carry out a good radiopathologic correlation.

Benign adenomyoepithelioma of the breast: a case report

The diagnosis of adenomyoepitheliomas is difficult and relies on the presence of a double component of epithelial and myoepithelial cells belonging to the breast lobules and ducts. The clinical and imaging characteristics are not specific; thus, the diagnosis is histological. In this article, we present a case of a young female who presented with a 2 cm lump in the breast without other clinical symptoms, which revealed a benign adenomyoepithelioma (AME). We performed a large excisional lumpectomy, and the patient recovered well with no complication or recurrence within two years follow-up. When it comes to adenomyoepitheliomas, the published literature is mainly composed of case reports, so much so that there are no evidence-based guidelines. Our case shows that an excisional lumpectomy is often enough when facing a small size tumor with no signs of malignancy, which contributes to the limited data on the subject.

Diagnostic challenges of adenomyoepithelioma: A case report

INTRODUCTION

Breast adenomyoepithelioma is a very uncommon tumor, which is generally considered to be benign, however malignant transformation has been reported.

PRESENTATION OF CASE

We report two cases of two women with breast adenomyoepithelioma.

CONCLUSION

Diagnosis of adenomyoepithelioma is challenging because tumor may mimic other breast diseases. It has neither specific clinical signs nor radiological features, and the diagnosis is based on histopathological examination of the lesion. The treatment of choice is surgery. The type of surgery depends on the tumor factors and breast size. In malignant cases treatment such as radiotherapy, chemotherapy, immunotherapy may be used as well. It is very important to give an adequate treatment, otherwise the risk of tumor recurrence, growth or even metastatic spread, when tumor has malignant potential, increases.

Establishment and characterization of organoids from a patient with adenomyoepithelioma of the breast

Adenomyoepithelioma (AME) of the breast is a rare tumor that is composed of proliferating epithelial and myoepithelial cells. The pathogenesis of AME remains unclear, and no breast cancer cells have been identified in such tumor tissues. In this study, we established patient-derived breast cancer organoids from the surgical tumor samples of an elderly Chinese woman with an AME of the breast. Our findings confirmed the successful establishment of organoids from an AME of the breast of this patient. A short tandem repeat analysis revealed that the DNA signature of the AME of the breast organoids matched the DNA signature of the original tumor specimen. Moreover, diameter assay confirmed that the organoids from the breast AME showed sensitivity to paclitaxel and doxorubicin treatments, which was similar to, but lesser than that of primary culture cells. In conclusion, we established an efficient 3-dimensional breast cancer organoid culture platform from an AME of the breast. This platform can be effectively used for exploring clinicopathological and genomic characteristics of AME of the breast to identify possible treatments and increase awareness about this disease entity.

Adenomyoepithelioma of the breast with malignant transformation and repeated local recurrence: A case report

BACKGROUND

Adenomyoepithelioma (AME) of the breast is a rare type of benign breast tumor. Many AMEs show benign behavior, but reports of the malignant type are rare. We present the case of a patient with AME with repeated local recurrences and further malignant transformation.

CASE SUMMARY

A 53-year-old woman visited our hospital with a 16-mm palpable mass in the right breast. A core needle biopsy was performed. The pathological diagnosis was AME. Lumpectomy with a safety margin was performed without axillary lymph node dissection (ALND). Two years later, local recurrence developed, and the patient again underwent lumpectomy with a safety margin. The pathology showed malignant AME, and the margin was negative. Eight months later, local recurrence developed again in the same location, and a total mastectomy was performed without ALND. The pathological diagnosis was malignant AME. The patient was disease-free for three years posttreatment.

CONCLUSION

The treatment of AME requires caution, as it may exhibit repeated recurrences after local excision as well as malignant transformation.

Breast adenomyoepithelioma from a radiologic perspective

Adenomyoepithelioma of the breast (AB) is an uncommon tumor that is characterized by the biphasic proliferation of epithelial and myoepithelial cells. The radiologic findings for AB have been scantly reported. This paper aims to analyze the characteristic findings for AB on ultrasonography (US) and mammography. This retrospective descriptive study used the Breast Imaging-Reporting and Data System (BI-RADS) to analyze the US and mammography findings for histologically confirmed AB in patients attended at our institution between 2007 and 2019. We identified a total of 13 AB in 13 women. All patients underwent US. On US, 12 lesions were seen as oval nodules, and the remaining lesion was irregular-shaped; 8 lesions had circumscribed margins, 3 had angled margins, and 2 had microlobulated margins. Regarding the echo pattern, 8 lesions were hypoechoic and 5 were complex (solid-cystic). On color Doppler, 11 lesions were vascularized nodules and 2 were avascular nodules. In conclusion, we present the imaging characteristics for a series of cases of AB. It is unlikely that this lesion can be suspected solely on the basis of the imaging findings; nevertheless, it is important for radiologists to be familiar with AB to carry out a good radiopathologic correlation.

Adenomyoepithelioma of the breast: Case series and literature review

Adenomyoepithelioma of the breast is a rare tumor consisting of both epithelial and myoepithelial cells. Malignant transformation of either cell line can occur. We describe the imaging features, clinical presentation, and management of seven cases of biopsy-proven adenomyoepithelioma at our institution.