November 17, 2010
This 9–month–old boy was initially evaluated at age 6 weeks for an extensive eczematous rash on the head and antecubital and diaper areas and blood and mucus in the stool with each diaper change over a 2– to 3–week period. The symptoms were attributed to milk allergy, and the infant’s formula was changed. At 8 weeks of age, a petechial rash developed on the boy’s trunk and legs. His symptoms persisted despite multiple formula changes, and he was referred to the emergency department.