International journal of surgery case reports · 2026
Fibrocystic disease within an axillary accessory breast (Kajava class IV): a case report.
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Al-Ahmar Rawan, Haj Osman Osama, Ghabreau Lina, Ayoub Kusay
Аннотация
INTRODUCTION: Accessory breast tissue is a congenital anomaly occurring in 0.4-6% of the population, most commonly in the axilla. While this tissue is subject to the same physiological and pathological changes as orthotopic breast tissue, fibrocystic disease presenting as a large axillary mass is rare, representing a diagnostic challenge that mimics lipomas and other conditions common in the axillary region.
CASE PRESENTATION: We report a case of 33-year-old female who presented with a chronic painful mass in the left axilla that have been present for 10 years. Clinical examination revealed a soft, mobile mass without associated nipple or areola (Kajava Class IV). Initially suspected to be a lipoma, ultrasonography suggested ectopic breast tissue. Excisional biopsy was performed, revealing a mass of size 9 × 8.5 x 3.5 cm. Histopathological analysis confirmed benign mammary parenchyma with prominent fibrocystic changes, including ductal ectasia and apocrine metaplasia. The patient showed satisfactory recovery with no recurrence at the 1-month follow-up.
DISCUSSION: This case emphasizes the importance of including accessory breast tissue in the differential diagnosis of axillary swellings, even when clinical features suggest more common benign lesions like lipomas.
CONCLUSION: Early recognition through clinical suspicion, imaging, and histopathological confirmation is crucial, particularly in low-resource settings, to ensure appropriate management and monitor for potential neoplastic transformation.
CASE PRESENTATION: We report a case of 33-year-old female who presented with a chronic painful mass in the left axilla that have been present for 10 years. Clinical examination revealed a soft, mobile mass without associated nipple or areola (Kajava Class IV). Initially suspected to be a lipoma, ultrasonography suggested ectopic breast tissue. Excisional biopsy was performed, revealing a mass of size 9 × 8.5 x 3.5 cm. Histopathological analysis confirmed benign mammary parenchyma with prominent fibrocystic changes, including ductal ectasia and apocrine metaplasia. The patient showed satisfactory recovery with no recurrence at the 1-month follow-up.
DISCUSSION: This case emphasizes the importance of including accessory breast tissue in the differential diagnosis of axillary swellings, even when clinical features suggest more common benign lesions like lipomas.
CONCLUSION: Early recognition through clinical suspicion, imaging, and histopathological confirmation is crucial, particularly in low-resource settings, to ensure appropriate management and monitor for potential neoplastic transformation.