Diagnosis of acute pediatric sinusitis must be made on the basis of signs, symptoms, and clinical examination. Laboratory tests may be normal even in complicated sinusitis (Pitkäranta et al. 1999; Hytönen et al. 2000), and radiolog- ical fi ndings do not necessarily correlate with a child’s clinical condition. Pathological fi ndings are frequently found in plain radiographs, CT, and MRI of children with common colds, and also in children without symptoms of a respi- ratory infection (Kronemer and McAlister 1997; American Academy of Pediatrics 2001; Schwartz et al. 2001; Kristo 2002). Nor is ultrasound reli- able (Kronemer and McAlister 1997). Because.
