Spontaneously Draining Axillary Tumors in a Young Woman

A 19-year-old G1P1A0 woman presented to the dermatology clinic for evaluation of bilateral axillary swelling, pain, and spontaneous drainage of approximately 2 weeks' duration.The patient, who was 2 weeks postpartum, reported that the symptoms were associated with lactation when breastfeeding.She denied any personal or family history of hidradenitis suppurativa or other formally diagnosed dermatologic condition.Physical examination revealed a soft, mildly tender, well-circumscribed, nonfluctuant mobile mass in each axilla.Both lesions had a single central sinus tract with thin lactescent discharge that spontaneously drained and was expressible.A single thin hyperpigmented papule was noted on the anterior aspect of each mass.WHAT'S YOUR DIAGNOSIS?a. ectopic (accessory) breast tissue b. epidermoid cyst c. hidradenitis suppurativa d. subcutaneous