A MASS was discovered protruding between the labia minora of a 12-hour-old newborn infant. The mass was noticeable when the infant cried. She had passed meconium and had voided 3 times. Findings from the remainder of the physical examination were unremarkable. The mass was soft, tense, and seemed nontender (Figure 1). It was pale and translucent in appearance and increased in size as she cried. No urethral or vaginal openings could be identified. Figure 2, Figure 3, Figure 4, and Figure 5 show other interlabial masses to consider in the differential diagnosis of this lesion.