How do childhood diseases differ from diseases in adults?

Childhood diseases and disorders differ from those in adults primarily due to the unique physiological, developmental, and immunological characteristics of a growing organism.12

Physiological and Developmental Differences

Children, particularly infants, have a limited ability to maintain homeostasis under stress due to higher metabolic requirements and immature renal and hepatic functions. For instance, the newborn liver has a limited capacity to excrete bilirubin, which can lead to kernicterus—a condition rarely seen in adults. Additionally, children’s drug metabolism and excretion rates differ from adults, necessitating careful dosage adjustments.1

Immunological and Clinical Variations

The pediatric immunologic system functions differently; for example, the reticuloendothelial system is more active in children, often resulting in rapid swelling of lymph nodes, tonsils, and adenoids during mild infections. Furthermore, many clinical features in early childhood arise because infections are being encountered for the first time.1

Disease Prevalence

While many diseases overlap, some are unique to children, such as precocious puberty, while others like acute nephritis are significantly more common in pediatric populations. Conversely, conditions prevalent in adults, such as gout and essential hypertension, are infrequent in children. Pediatric care also places a distinct emphasis on the management of congenital disorders.2