Axillary polymastia

Carcinoma Originating from Aberrant Breast Tissue: Case Report and Review of the Literature

“…Polymastia is the term used to describe the presence of more than 2 breasts in human subjects; it is synonymous with ectopic, accessory, or supernumerary breast [7,10,20].…”

“…EBT results from a failure of regression of the mammary ridges during embryogenesis [3]. It can be present anywhere along the milk line, from the axilla to the inguinal region [4][5][6][7][8][9][10][11]. The incidence of ectopic accessory breast is uncertain, but it is generally accepted to be found in 1-2% of humans [12,13].…”

Fibroadenoma of the Axilla in A Patient With Macroprolactinoma

“…Since they arise from lobules, it is not surprising that these are seen predominantly in women in the 15-25 age group, even though they may be diagnosed later [10]. However, it rarely is described in axillary supernumerary breasts [2]. We conducted a systematic literature review regarding case reports of fi broadenoma in axilla by searching pubmed, using the following terms: "axillary breast" and "fi broadenoma" / "ectopic breast" and "fi broadenoma" / "axilla" [and] "fi broadenoma" / "supernumerary breast" and "fi broadenoma".…”

“…The axilla is the most common site, accounting for approximately 60 to 70% of accessory breast tissue [2]. The diagnosis of ectopic breast tissue is important because this tissue is also subject to the same alterations and diseases, whether benign or malignant, which affect naturally positioned breasts [3].…”

Fibroadenoma of the ectopic breast of the axilla

“…Axillary breast tissue is a common variant of EBT, with a reported incidence of 2-6% in women [1]. It is twice as common in female patients as in males [2]. Diagnosis of EBT is important because EBT shows similar pathologic changes that occur in naturally positioned breasts.…”