Mammary-Like Gland Pathology in Anogenital Systems
Summary
Anogenital mammary-like glands represent a normal component of the vulvar and perianal skin, sharing morphological and immunohistochemical characteristics with breast tissue. Pathology arising in these structures encompasses a spectrum from benign fibroepithelial proliferations to malignant transformation. Accessory breast tissue persisting along the embryonic milk line may give rise to fibroadenomas and phyllodes tumours indistinguishable from their mammary counterparts, while apocrine-derived neoplasms such as hidradenoma papilliferum reflect the secretory lineage of these glands. Malignant lesions including adenocarcinoma and phyllodes sarcoma, though rare, demand precise histological evaluation supported by hormone receptor profiling. Diagnostic challenges stem from their uncommon location, often masquerading as soft-tissue masses or dermal cysts, and necessitate multimodal assessment including imaging, surgical excision and immunohistochemistry. Recent advances have highlighted the role of oestrogen and progesterone receptors in tumour biology and the importance of long-term surveillance. Understanding the interconnections between embryology, hormonal milieu and neoplastic transformation is crucial for optimising clinical management and advancing translational research.
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Mammary-Like Gland Pathology in Anogenital Systems publication trend
The graph below shows the total number of articles in mammary-like gland pathology in anogenital systems across all publications each year (not limited to Nature Index journals).
Technical terms
Mammary-like glands: Specialised glandular structures in the anogenital skin mirroring breast lobular units.
Ectopic breast tissue: Residual mammary tissue located outside the pectoral region along the embryonic milk line.
Fibroadenoma: Benign fibroepithelial neoplasm composed of stromal and epithelial components, common in breast and ectopic sites.
Hidradenoma papilliferum: Benign apocrine gland tumour of the anogenital region characterised by papillary structures.
Phyllodes tumour: Fibroepithelial neoplasm with a characteristic leaf-like architecture found in mammary and ectopic breast tissue.
References
- Primary Breast Adenocarcinoma in Ectopic Breast Tissue in the Vulva. Case Reports in Obstetrics and Gynecology (2013).
- Unexpected presentation of accessory breast: vulvar accessory breast tissue: a case report. Journal of Medical Case Reports (2023).
- Perineal fibroadenoma masquerading as a soft-tissue sarcoma: a case report. Journal of Surgical Case Reports (2023).
- Primary Benign Phyllodes Tumour of the Labia Minora: An Uncommon Entity. Cureus (2022).
- Hidradeonoma Papilliferum of the Anus: A Case Report About the Relationship Between Neoplasms of the Mammary-Like-Glands and Hormones. Cureus (2021).
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