Primary Immunodeficiency May Be Misdiagnosed as Cow’s Milk Allergy: Seven Cases Referred to a Tertiary Pediatric Hospital

Table 2

Important clinical findings in CMA versus PID [3, 6].

	CMA	PID
Respiratory tract	Chronic cough*; Wheezing*; Dyspnea*	Recurrent sinusitis; Recurrent/severe pneumonia; Otitis; Lung abscess; Bronchiectasis
Gastrointestinal tract	Frequent regurgitation; Abdominal pain; Vomiting; Diarrhea; Constipation; Blood in stool; Iron deficiency anemia	Chronic diarrhea; Giardiasis; Hepatic abscess; Crohn’s disease like; Blood in stool; Autoimmune enteropathy
Skin	Atopic dermatitis; Urticaria	Eczema; Furunculosis; Abscess; Erytrodermia
General	Failure to thrive	Failure to thrive; Positive family history of PID

∗Unrelated to infection.