A male infant with bumps on his feet.

A 7-month-old male infant was referred by his pediatrician for evaluation of “two small bumps on the feet” since a month before. The size of these lesions reportedly had not changed in the past month, and they did not seem to bother the patient. The patient was born full-term with no complication, was at the 25th percentile for birth weight, and was average for height and head circumference. The patient and his mother were discharged from hospital after 2 days. The patient was solely breastfed up until