Phyllodes tumor arising in ectopic breast tissue of the axilla

Abstract Introduction/Objective Ectopic breast tissue (EBT) is a well-documented anomaly of the breast and commonly presents along the embryonic milk line extending between the axilla and groin. Reported incidence of accessory breast is 0.4–6% in females. Pathologies developing in an EBT are reported as a rare entity in the literature. Carcinoma is reported as the common pathology followed by inflammation and fibroadenoma Methods We present a case of 43-year- old female who presented with a painless mass in her right groin for the past year which gradually increased in size. CT abdomen pelvis with contrast showed a 2.2 x 3.0 x 4.4 cm superficial soft tissue mass in the right groin which was suspected to be a lymph node. Further investigation and histopathological report of biopsy showed ectopic breast tissue with admixed chronic inflammation and reactive changes.However, excision of the mass three months later showed showed proloferation of both glandular and stromal elements. Results The tissue from the biopsy was positive for GATA 3, mammoglobin, GCDFP and CD 10 and the histological features on excision was confirmatory of fibroadenoma. Conclusion In conclusion, when tumors or nodules are found along the mammary line, the presence of breast tissue should be considered during the investigation. It is clinically wise to evaluate and screen carefully cases of supernumerary breast for any pathology and for any associated urogenital anomalies such as supernumerary kidneys, polycystic kidneys and renal cell adenocaricnoma. In our case, patient had no associated urogenital anomalies and she is on follow up.

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Ectopic breast tissue and cancer

Breast Cancer Research and Treatment ◽

10.1007/s10549-018-05093-9 ◽

2018 ◽

Vol 174 (2) ◽

pp. 551-552

Author(s):

Alessandro Sindoni ◽

Maria Gioffré-Florio ◽

Fausto Famá

Keyword(s):

Breast Tissue ◽

Ectopic Breast Tissue ◽

Ectopic Breast

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An Ectopic Breast Tissue Presenting with Fibroadenoma in Axilla

Case Reports in Surgery ◽

10.1155/2013/947295 ◽

2013 ◽

Vol 2013 ◽

pp. 1-3

Author(s):

Anandhi Amaranathan ◽

Kanchana Balaguruswamy ◽

Ramachandra V. Bhat ◽

Manash Kumar Bora

Keyword(s):

Breast Tissue ◽

Cardiac Anomaly ◽

Excision Biopsy ◽

Rare Entity ◽

Renal Anomalies ◽

Case Presentation ◽

The Past ◽

Ectopic Breast Tissue ◽

The Right ◽

Ectopic Breast

Introduction. The congenital anomalies of breast, especially the polymastia (supernumerary breast) and polythelia (supernumerary nipple), always do not fail to amuse the clinicians because of their varied presentations, associated renal anomalies, and pathologies arising from them. The axillary polymastia is a variant of ectopic breast tissue (EBT). Ectopic breast tissue can undergo the same physiological and pathological processes as the normally located breast. The incidence of fibroadenoma developing in ectopic breast is reported as a rare entity, the most common being the carcinoma.Case Presentation. A 31-year-old Dravidian female presented with a lump of 4 cm in the right axilla for the past year which gradually increased in size, giving discomfort. Our initial differential diagnosis was fibroadenoma, lipoma, and lymphadenopathy. Further investigation and histopathological report of excision biopsy confirmed it as a fibroadenoma on ectopic breast tissue in the axilla. Patient has no associated urological or cardiac anomaly.Conclusion. This case has been reported for its rarity and to reemphasise the importance of screening of EBT for any pathology during routine screening of breast.

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