A 20-year-old gravida 1, para 1, African American woman presented 5 months' postpartum with a nonpainful right axillary mass that had an acute onset at 5 months' gestation. The mass had enlarged gradually during her pregnancy and decreased to the present size within 1 month after delivery. Pregnancy and delivery were uncomplicated, with the infant being born healthy at 40 weeks' gestational age. The patient did not breastfeed, and her menses resumed at 6 weeks' postpartum. She complained of right axillary irritation, difficulty shaving the area, and hindrance of free movement of her right arm. She had no personal or family history of axillary lesions, hidradenitis, or breast, urinary, or renal disease.
Jordan K, Laumann A, Conrad S, Medenica M. Axillary Mass in a 20-Year-Old Woman. Arch Dermatol. 2001;137(10):1367-1372. doi: