The relationship between functional abdominal pain (FAP) and occult constipation (OC) in children who did not meet the Rome III criteria for constipation has rarely been reported. This study aimed to estimate the prevalence of OC in patients with FAP and to compare the effectiveness of prokinetic drugs and laxatives for FAP and OC. Pediatric outpatients (n = 212; aged 4–15 years) who satisfied the Rome III criteria for childhood FAP were divided into 2 groups based on Leech scores: group 1 < 8; group 2 ≥ 8. Group 2 received either prokinetic drugs or laxatives and pain severity was assessed after 2 weeks, 1 month, and 3 months. A total 52.4% (111/212) of patients had OC in this study. More patients who received laxatives had reduced pain scores compared with those who received prokinetic drugs. Those treated with laxatives in group 2 had a better response than those treated with prokinetic drugs throughout the study period (P < 0.001, P < 0.001, and P = 0.002 after 2 weeks, 1 month, and 3 months, respectively). OC was frequently encountered in children with FAP. Laxatives can be more effective than prokinetic drugs for relieving symptoms of FAP in children with a Leech score ≥ 8 and suspected OC.

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the medical records of patients with BCL, NFKD, and typical KD were retrospectively reviewed. We analyzed and compared the demographic, clinical, laboratory, and imaging characteristics of the cohorts. Results: Twenty-two patients with BCL, 37 with NFKD, and 132 with typical KD were included in this study. Patients with BCL had longer durations of hospitalization than patients with NFKD. Bilateral and multiple enlarged cervical lymph nodes were associated more with NFKD than BCL. Compared with BCL patients, NFKD patients had lower platelet counts, higher percentages of neutrophils, and higher C-reactive protein (CRP) levels. NFKD patients were older and presented with higher white blood cell counts, percentages of neutrophils, absolute neutrophil counts, and CRP levels as well as lower platelet counts and alanine aminotransferase levels than typical KD patients. Conclusions: In febrile patients with cervical lymphadenopathy, the combination of bilateral and multiple enlarged nodes, low platelet count, high percentage of neutrophils, and high CRP levels should prompt consideration of NFKD for prevention of delayed diagnosis of KD.