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Nipple adenomas are rare, benign breast lesions that present similarly to breast malignancies, often manifesting with unilateral bloody discharge, a palpable mass, and/or nipple distortion. Imaging techniques have limited specificity in distinguishing nipple adenomas from malignancy; therefore, clinicians must rely on histologic and immunohistochemistry evaluation. Here, we highlight the case of a 69-year-old woman with bilateral nipple adenomas presenting as an enlarging nipple mass with chronic nipple discharge. Complete lesion resection with clear margins stands as the primary route of management and complete avoidance of re-occurrence. However, partial excision with nipple preservation has been reported to be successful in selected cases.

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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.

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BACKGROUND: Nipple adenoma is a very uncommon, benign neoplasm that involves the nipple. A palpable mass of the nipple associated with nipple discharge and erosion or ulceration is the common clinical presentation. Generally, complete surgical excision of the nipple is the main treatment, alternative therapeutic methods such as Mohs micrographic surgery, nipple splitting enucleation, and cryotherapy can be considered. Disorders of the breast in young women are generally benign. Even if the management during pregnancy is usually conservative and surgical excision is reserved for very strong malignancy suspicion, benign lesions can cause the impossibility to breastfeed after giving birth when involving the nipple. CASE PRESENTATION: We present the case of a 28-year-old female, who was referred to the Breast Unit of the University Hospital of Modena (Italy) in May 2020 with a 12-months history of enlargement of the left nipple with associated erythema, serohemorrhagic discharge, and pain in the left nipple region. The diagnostic assessment came out in favor of a nipple adenoma. After surgical treatment was recommended, the patient got pregnant. Taking into account the major risks of surgery during pregnancy, a multidisciplinary discussion was conducted, to consider whether to proceed with surgery or postpone it after pregnancy. Because of the volume and the position of the adenoma, the indication for surgical excision was confirmed, to allow regular lactation and breastfeeding immediately after giving birth and to avoid potential obstructive complications. Surgical excision of nipple adenoma without complete resection of the nipple was performed after her first trimester of pregnancy under local anesthesia. A histopathological examination confirmed the diagnosis. No recurrence occurred after 12 months. The patient gave birth, had no deficit in lactation, and successfully breastfed. CONCLUSIONS: Therefore, we consider that nipple adenoma enucleation might be a safe treatment even during pregnancy. Moreover, conservative local treatment of nipple adenomas can preserve the nipple aesthetically and functionally, thus allowing regular lactation and breastfeeding in young women.

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The purpose of this presentation is to show the ultrasonography findings of normal variants and benign and malignant diseases that affect the nipple-areolar complex. Many of which have unspecific clinical and radiological presentations that can present a challenge for medical specialists. Experienced specialists need to know the different imaging modalities used to study the nipple-areolar complex and the aspect not exactly senology, as well as dermatologist who approach the ultrasound must know the anatomy of this complex area. We will show you a combined clinical and radiological approach to evaluate the nipple-areolar complex, the findings for the normal morphology and the most common benign and malignant diseases that can affect this region. We discuss the characteristics of the different ultrasonography findings and provide guidance on how to avoid artifacts and pitfalls.

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A nipple adenoma is an epithelial tumor of the lactiferous ducts, typically affecting women aged 50-60 years old. This case report discusses a 52-year-old woman who developed a papillary adenoma of the right nipple after initiating oral estrogen replacement therapy (ERT) for perimenopausal symptoms. A 4 mm punch biopsy and subsequent immunohistochemistry stain revealed the proliferation of ductal structures consistent with a papillary adenoma and tumor cells expressing estrogen receptors (ER) and progesterone receptors (PR). Despite their benign nature, nipple adenomas may exhibit alterations in immunophenotype, including ER and PR expression, which could lead to potential tumor growth in women undergoing these treatments. This case describes the first reported growth of a nipple adenoma in the context of estrogen replacement therapy, highlighting a potential risk of hormone therapy in promoting hyperproliferation of benign tumors such as nipple adenomas. When utilizing ERT, it is important to weigh the potential advantages and risks, as its application in the management of vasomotor symptoms during menopause may increase the risk of both breast cancer and benign proliferative breast diseases. These considerations underscore the need for individualized therapy when approaching perimenopausal and postmenopausal care.

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Nipple adenoma is a rare proliferative lesion that originates from the lactiferous ducts of the nipple. Though it is benign, the typical presentation includes suspicious symptoms-a firm nodule, crusting erosion, and/or discharge from the nipple. These findings can raise concern for malignancy and in particular, Paget's disease. We report two cases of this uncommon entity, highlighting the variable clinical presentation and keys to the diagnostic evaluation and management.

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Nipple adenomas (NAs) are benign neoplasms composed of papillary hyperplasia of the epithelium of the major lactiferous ducts. Patients with NA may report bloody nipple discharge and clinically may resemble Paget disease, raising concern for malignancy. Mammographically, NAs are often occult. US can show a hypervascular circumscribed mass centered within the nipple with varying echogenicity. Diagnosis is usually made on punch biopsy or excision, but breast radiologists should be aware of this entity. Malignancy can be found elsewhere in the ipsilateral or contralateral breast, or very rarely may directly extend to involve an NA, but published experience with concurrent malignancies is small. We describe the radiologic-pathologic correlation of NAs.

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A 26-year-old female with a palpable mass and progressively darker itchy area in her left nipple was admitted to hospital. The left nipple surface showed furfuraceous desquamation and bloody discharge, with a 1.0×0.7×0.4 cm area of grayish-brown pigmentation in the ipsilateral nipple and areola. Surgical resection of the primary skin tumor and biopsy of the partial mass in the middle of the nipple were undertaken since color Doppler ultrasonography and dermoscopy were unable to make a differential diagnosis. We thus report the first case of a nipple adenoma with concomitant ipsilateral nipple areola Spitz nevus.

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We present a rare case of nipple adenoma in a 53-year-old Caucasian woman. The lesion presented with a hemorrhagic nipple surface and was treated with wide surgical excision of the nipple and part of the surrounding areola and with a double purse-string surgical closure of the remaining areolar area. This technique was considered safe and effective and aimed to reconstruct the nipple area, thus providing the patient with an acceptable aesthetic result. Double purse-string surgical closure is proposed as a unique and straightforward, oncologically safe surgical procedure. This technique combines complete removal of the nipple adenoma, preservation of the remaining areola, minimization of skin flattening at the reconstructed area, improvement of the long-term aesthetic result, and provision of a satisfactory surgical option for the patient.

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A nipple adenoma is a rare benign breast tumor. The commonest presentation of this rare entity is nipple erosion, serosanguinous discharge, induration, or tumor formation at the nipple. It often mimics malignant breast lesions or nipple eczema and is mistaken for Paget's disease of the nipple or dermatological pathology. It may be misdiagnosed pathologically as ductal carcinoma of the breast. This may cause a diagnostic delay or a faulty diagnosis. Treatment is the excision of the tumor with or without nipple excision. Here, we report a case of nipple adenoma that projected out of the nipple along with nipple erosion, serosanguinous discharge, and occasional bleeding from the adenoma. A 37- year-old woman presented with a tumor on her right nipple for eight months, with the erosion of the nipple and serosanguinous discharge. The patient gave a history of a small amount of bleeding occasionally. Axilla was normal. The patient was advised to have a mammosonography. It showed an oval-shaped, well-demarcated, hypoechoic, uniformly solid nodule in the right nipple. There was no microcalcification seen on mammography. A punch biopsy was done to establish the diagnosis. It showed ductal hyperplasia and papillary proliferation of glandular structures suggestive of nipple adenoma. Complete resection of the tumor with partial excision of the nipple was done with a satisfactory cosmetic result. Though very uncommon, the possibility of nipple adenoma should be thought of when a patient presents with nipple erosion and discharge with or without a clinically obvious tumor. Timely diagnosis with histopathological correlation is important since it allows for less invasive surgical methods. In our case, we could attain a cosmetically satisfactory outcome without a remnant tumor. Paget's disease of the nipple also has a similar clinical presentation, and it is a premalignant condition. The objective of presenting this case is to highlight the possibility of this rare benign condition, which may be easily missed clinically and also demands careful histopathological examination for its correct diagnosis.

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BACKGROUND: Both Paget's disease (PD) and nipple adenoma (NA) are rare lesions occurred on nipple and share some similarities in clinical manifestations, but there are have different pathological manifestations and imaging findings. This study analyzed the clinicopathological and imaging features of PD in nipple and NA to improve our knowledge about these two diseases and to provide guidance for clinical diagnosis and treatment. METHODS: Retrospectively analyzed 99 female patients confirmed by surgery and pathology from January 2014 to December 2018. The features of imaging examination included 95 cases of breast ultrasound, 83 cases of breast X-ray and 24 cases of magnetic resonance imaging (MRI) were analyzed and compered the detection rate and diagnostic accuracy. RESULTS: The 99 patients consisted of 76 patients with PD and 23 patients with NA. Despite the similarity of clinical manifestations between PD and NA, the pathological features of these diseases were completely different. Differences in various imaging manifestations were found to facilitate differential diagnosis. Breast X-ray and ultrasound can discover the nipple areola changes such as mass and calcification, but some cases still show negative. Breast MRI can clearly show the areola lesions of nipple PD and NA, accurately evaluate the degree and size of breast lesions, and help clinicians choose appropriate and personalized diagnosis and treatment methods. CONCLUSIONS: The combination of multiple breast imaging examinations (including X-ray, ultrasound, and MRI) can improve the diagnosis of PD and NA and play a guiding role in the options for clinical treatment.

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Syringomatous adenoma of the nipple (SAN) is a benign and locally infiltrative lesion possibly arising from the sweat gland ducts in the nipple-areolar region. This rare lesion has been reported in the female breast; however, reports on the male breast are extremely rare. Although benign, SAN has a high risk of recurrence. The clinical presentation and histomorphological features often mimic a malignancy. Hence, an awareness of this lesion is required to make a correct diagnosis. In this report, we describe the histomorphological features of SAN in a male breast.

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Characteristic finding of nipple adenoma (NA) in dermoscopy (red dots in linear, radial, or semicircular patterns) can help in accurate clinicopathologic diagnosis of NA vs other inflammatory, benign, and especially malignant nipple lesions.

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Nipple adenoma (NA) is a rare benign breast neoplasm that seldom co-exists with breast carcinoma (BC). Majority of these BC are separate from NA, and their origin from NA is an extremely rare event. We herein describe a case of 65-year-old female who had a painless lump for 15 years which increased in size and ulcerated for last six months. Microscopic examination of the wedge biopsy of nipple showed features of NA at superficial aspect and invasive carcinoma from it at the deeper aspect. The patient underwent mastectomy and axillary clearance, which revealed a 4-cm invasive breast carcinoma, no special type with axillary lymph node involvement. The patient received adjuvant chemotherapy, radiotherapy and adjuvant hormonal therapy. The patient is alive and disease-free after 36 months. NA should be carefully evaluated for co-existent BC because it completely changes the treatment plan and prognosis.

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Ultrasound (US) is an attractive diagnostic approach to identify both common and uncommon nipple pathologies, such as duct ectasia, nipple abscess, nipple leiomyoma, nipple adenoma, fibroepithelial polyp, ductal carcinoma in situ (restricted to nipple), invasive carcinoma, and Paget's disease. US is the reliable first-line imaging technique to assess nipple pathologies. It is useful to identify and characterize nipple lesions. Additionally, we have presented the mammography and MRI outcomes correlated with histopathologic features for the relevant cases.

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The nipple-areola complex is the origin of various morphologically distinct tumors and tumor-like lesions, which can be delineated from the special structures of the nipple, in particular the intramammary ducts, skin-appendages, and the intramammary stroma. Benign tumors are most frequent and this includes epithelial tumors such as mammary adenoma and syringomatous tumor of the nipple. Less commonly observed are benign mesenchymal tumors such as leiomyoma of the nipple, or tumor-like lesions like pseudo-lymphoma. With excess formations of the nipple, the different forms of polythelia and polymastia have to be considered.

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