• Taejin Park, Han Shin Lee, Eun Jung Jung, Ju Yeon Kim, Chi Young Jeong, Young Tae Ju, Young Joon Lee, Soon Chan Hong, Bo Hwa Choi, and Hyo Jung An.
• Department of Surgery, Gyeongsang National University School of Medicine and Gyeongsang National University Changwon Hospital, Changwon.
• Medicine (Baltimore). 2018 Nov 1; 97 (45): e12946e12946.

RationaleLymphangiomas develop in the head, neck, and axilla of patients <2 years old in more than 90% of cases. They are rarely reported in adults.Patient ConcernsHere, we report on a 37-year-old woman with a firm, hypoechoic 3.3 cm mass in the right upper, outer quadrant of the breast with discomfort, and swelling of the right axillary region.Diagnosis And InterventionsShe underwent wide excision of the right breast and axillary lesion and the lesion pathologic finding is lymphangioma of the breast.OutcomesShe was in good condition with no signs of postoperative complications and no evidence of recurrence at 6 months postsurgery.LessonsDespite the rarity of breast cystic lymphangioma, its evaluation should be considered for prompt diagnosis and definitive treatment to prevent recurrence and complications. Furthermore, this is the first case of concomitant lymphangioma of the breast parenchyma and axillary region.

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