. 2019 Feb 27;22(3):395–400. doi: 10.1007/s40477-019-00365-6

Table 2.

Incidental findings during breast ultrasound (US) in infants < 6 months old

Finding	N (%)^a	First noted on US at weeks of life: mode^b (range), weeks
Breast cysts	7 (1.8%)	0.4, 4^c (0.4–8)
Ducts ectatic or prominent	4 (1.0%)	4 (4–24)
Chest wall cyst	1 (0.3%)	16 (no range)
Accessory breast tissue	1 (0.3%)	0.4 (no range)

^aNumber (N) is the number of infants with the given feature mentioned at any of the study visits. % is given with reference to the 398 children who completed the first study visit at 72 h of life (0.4 weeks)

^bMode represents the central tendency among visits at 0.4 weeks (72 h), 4 weeks, 8 weeks, 16 weeks, and 24 weeks