| Epidemiological features |
| Age (yr) | |
| Mean±SD | 12.1±2.9 |
| Median (range) | 13 (5–17) |
| Female | 16 (46) |
| Systemic symptom |
| Fever | 34 (97) |
| Total duration (day) | 12.2±8.3 (2–37) |
| Duration before admission (day) | 8.1±7.6 (1–30) |
| Fever peak >39.0°C | 20 (57) |
| Loss of appetite | 7 (20) |
| Loss of weight | 5 (14) |
| Fatigue | 5 (14) |
| Physical findings |
| Cervical lymph node enlargement | 34 (97) |
| Unilateral | 26 (74) |
| Bilateral | 8 (23) |
| Lymph node tenderness | 21 (60) |
| Diameter of the largest lymph node (mean±SD) (mm)* | 26.3±18.1 |
| Other lymph node enlargement† | 7 (20) |
| Mesenteric‡ | 5 (14) |
| Axillary | 2 (6) |
| Inguinal | 1 (3) |
| Splenomegaly | 14 (40) |
| Hepatomegaly | 4 (11) |
| Rash | 4 (11) |