患者男,25岁,因“发热、咳嗽1周”入院。查体最高体温39.4℃,轻咳无痰,X 线胸片示双肺纹理明显增强,右肺下野可见一小片状模糊影。血常规检查发现全血细胞减少,尤其以白细胞明显,为2.0×10~9/L。彩超检查为脾脏明显增大,肝脏轻度增大。诊断为肺内感染,给予抗炎、对症治疗。患者入院3 d 后体温开始下降,1周恢复正常。患 Male patient, 25 years old, due to “fever, cough 1 week ” admission. Examination of the highest temperature of 39.4 ℃, cough without sputum, chest X-ray showed significantly enhanced lungs, the right lung can be seen a small piece of the shadow of the hysterical shadow. Blood tests found that pancytopenia, especially leukocytes significantly, 2.0 × 10 ~ 9 / L. Color Doppler ultrasound examination was significantly increased, slightly increased liver. Diagnosis of pulmonary infection, given anti-inflammatory, symptomatic treatment. After 3 days of admission, the temperature of the patients started to drop and returned to normal one week later. Suffering