患者，女，２４岁，左颌下发现一桂圆大肿块半年余，并持续性发热、头痛、咳嗽１个月。上述症状加重并全身散在性出血点１周入院。查体：Ｔ３９．７℃，中度贫血貌，全身皮肤有散在性出血点。两颌下淋巴结肿大，右侧为３ｃｍ×３ｃｍ大小，左侧为１．５ｃｍ×１．５ｃｍ大... The patient, female, was 24 years old and had a large lumpy mass under the left mandible for more than half a year. He had persistent fever, headache and cough for one month. The above symptoms worsened and the systemic scattered bleeding point was admitted to the hospital one week later. Physical examination: T39.7°C, moderate anaemia, and diffuse bleeding in the whole body. Two submandibular lymph nodes are swollen, the right side is 3cm × 3cm in size, the left side is 1.5cm × 1.5cm...