A 56-year-old man with diabetes mellitus presented to his primary care physician complaining of bleeding gums. He reported gingival bleeding after brushing his teeth without epistaxis, hematuria, ecchymosis, or melena. His only medication was metformin, and he denied family history of bleeding disorders or malignancy. Vital signs were stable. Physical examination was without lymphadenopathy, hepatosplenomegaly, petechiae, or ecchymosis. Laboratory studies revealed an isolated thrombocytopenia of 59 × 10⁹/L (reference range, 150-400 × 10⁹/L [to convert to ×10³/μL, divide by 1.0]) without anemia or leukopenia. There was no platelet clumping or abnormal platelet morphology on peripheral blood smear. White blood cell and red blood cell morphology were normal.

一名56岁的糖尿病男子因牙龈出血而向他的初级保健医生求诊。他报告刷牙后没有流鼻血，血尿，瘀斑或黑便，牙龈出血。他唯一的药物是二甲双胍，他否认有出血性疾病或恶性肿瘤的家族史。生命体征稳定。体格检查无淋巴结肿大，肝脾肿大，瘀斑或瘀斑。实验室研究显示，孤立的血小板减少症为59×10 ⁹ / L（参考范围为150-400×10 ⁹ / L [转换为×10 ³ /μL，除以1.0]），无贫血或白细胞减少症。外周血涂片无血小板结块或血小板形态异常。白细胞和红细胞形态正常。