患者,男性,73岁,因“全身皮肤紫癜、瘀斑3天。”入院。入院前3天无明显诱因出现全身皮肤紫癜、瘀斑,伴皮肤瘙痒,无血便,血尿,无鼻衄、牙龈出血,院外未行规范诊治,因皮肤紫癜进行性增多,故就诊于我院门诊反复查血常规示PLT1×109/l,今为正规诊治就诊于我院。入院前1周出现轻微咳嗽,无发热、咳痰,无潮热、盗汗,无乏力、纳差,未行治疗。既往体健,无食物、药物过敏史。无输血史。未到过疫区。有吸烟史50 Patient, male, 73 years old, due to “systemic purpura, ecchymosis 3 days.” "Admission. 3 days before admission there is no obvious incentive systemic skin purpura, ecchymosis, with pruritus, no bloody stools, hematuria, no epistaxis, bleeding gums, no normative diagnosis and treatment outside the hospital, due to skin purpura progressive increase, so visit our hospital Repeated blood test showed PLT1 × 109 / l, this is a regular diagnosis and treatment in our hospital. 1 week before admission mild cough, no fever, sputum, no hot flashes, night sweats, no fatigue, anorexia, no treatment. Past physical health, no food, drug allergy history. No blood transfusion history. Have not been infected area. Have a history of smoking 50