Finding	Possible cause
Distended abdomen	Abdominal mass, hepatosplenomegaly, Hirschsprung disease, intestinal malrotation with volvulus, necrotizing enterocolitis
Fever	Acute otitis media, appendicitis, bacteremia, endocarditis, meningitis, osteomyelitis, pneumonia, sepsis, urinary tract infection, viral respiratory infection
Lethargy	Hydrocephalus, meningitis, sepsis, subdural hematoma