例1,女,7月龄。因双耳下肿胀6d,发热4d以流行性腮腺炎收住院。无流行性腮腺炎接触史。查体:T37.9℃,双侧腮腺约4.5cm×3cm×1cm,颌下腺约2cm×2cm×1cm,质硬,触痛明显,颈部可触及2～3枚黄豆大小淋巴结,质硬。心肺无异常。腹软,肝肋下3cm,脾肋下1cm。入院后查血常规:白细胞15.8×10~9/L,中性粒细胞0.30,淋巴细胞0.70,异淋0.1O,考虑传染性单核细胞增多症不能排除,查嗜异凝集试验1:112,EBV-IgM(+),同时查腮腺炎抗体IgM(-),血清淀粉酶 347.1U,尿淀粉酶234U, Example 1, female, 7 months old. Due to swelling in both ears 6d, fever 4d to mumps hospital. Mumps-free history of exposure. Physical examination: T37.9 ℃, bilateral parotid gland about 4.5cm × 3cm × 1cm, submandibular gland about 2cm × 2cm × 1cm, hard, tenderness, neck can reach 2 to 3 soybean size lymph nodes, hard. No abnormal heart and lung. Abdomen soft, liver ribs 3cm, spleen ribs 1cm. Blood routine examination after admission: white blood cells 15.8 × 10 ~ 9 / L, neutrophils 0.30, lymphocytes 0.70, different leaching 0.1O, consider infectious mononucleosis can not be excluded, check heterophobic aggregation test 1: 112, EBV-IgM (+), mumps antibody IgM (-), serum amylase 347.1U, urinary amylase 234U,