Fibroadenoma in a suprapubic accessory breast

Ectopic breast tissue (EBT) is relatively common and can occur along the milk line or mammary ridge and often outside this line. We report a case of a female patient presenting with a suprapubic mass for 2 years, found later to be EBT containing a fibroadenoma. We believe this is a very rare finding. Moreover, we highlight the importance of considering EBT in the differential diagnoses of soft tissue masses.

Axillary Mass Turned Out to be A Phyllodes Tumour in An Ectopic Breast Tissue– A Rare Case Report

Background: Phyllodes tumours are rare fibroepithelial lesion, which accounts for less than 1% of all breast neoplasm. However, Phyllodes tumours arising from ectopic breast tissue are even rarer, with less than 15 cases ever reported involving the axilla, vulva, and groin. Case Presentation: A 27-year-old lady presented to the surgical clinic with left axillary swelling measuring 5cm x 6cm. Ultrasound of the axilla revealed heterogenous homogenous mass displacing the left axillary artery and vein medially. Excision was performed, and histopathological examination confirmed the diagnosis of a benign Phyllodes tumour. Conclusion: Phyllodes tumour in ectopic breast tissue over the axilla is a rare occurrence, and our case is the fourth case ever reported. Despite its rarity, diagnosis and treatment modalities are similar to Phyllodes tumour of the breast. Regular follow-up is recommended due to the risk of local recurrence.

Primary ectopic breast carcinoma in the axilla. A rare presentation and review of the literature

Ectopic breast tissue (EBT) develops as the result of the incomplete embryologic regression of the mammary ridge, which extends bilaterally from the anterior axilla folds to the inguinal folds in the fifth and sixth weeks of gestation. EBT is encountered in 0.3%–6% of women and 1%–3% of men and can be found anywhere along the milk line. It is subject to the same pathologic changes that affect the orthotopic breast. Primary carcinoma arising on the ectopic breast (PEBC) is a very rare occurrence accounting for 0.3%–0.6% of all breast cancers and is most frequently found in the axilla. Due to the rarity and atypical presentation of the disease, the diagnosis is often delayed. We herein present a very rare case of PEBC in the axilla along with a review of the literature. Any subcutaneous hypoechoic nodule located along the milk line without evidence of inflammation should raise concern for ectopic breast carcinoma. Accurate staging and differential diagnosis with detailed immunohistochemical analysis are required. No specific guidelines on diagnosis and treatment are available and the tumor is treated similarly to the orthotopic breast cancer of a similar stage. Physicians should be aware of this rare entity to avoid treatment delays.