深静脉血栓形成(简称DVT)通常见于虚弱或手术后病人,其诱发因素有长期卧床休息、恶性肿瘤、播散性血管内凝固、分娩、服雌激素、瘫痪和创伤。典型症状为局部深压痛和紧束感或患肢明显疼痛,行走时加剧。常见的体征为局部红、肿、热,表浅静脉分支怒张和踝强力背伸时小腿疼痛(Homan 氏征),也可能有发烧和心动过速等征象。然而,长跑运动员发生此症时,其征象不一定典型。本文报道的2例DVT 病人最初被误诊为肌内血肿和Baker 氏囊肿。病例1:男、34岁,发病七年前开始整年的马拉松跑训练,每周跑80哩。于一次以2:39的成绩跑完马拉松赛后五天,当其在高低不平的路面上跑步时,右踝关节连续2次急剧内翻,没有明显损伤, Deep vein thrombosis (referred to as DVT) is usually seen in patients with weakness or after surgery, the predisposing factors are long-term bed rest, cancer, disseminated intravascular coagulation, childbirth, taking estrogen, paralysis and trauma. Typical symptoms of local deep tenderness and tightness or limb obvious pain, walking worse. Common signs of local red, swollen, hot, superficial vein branches and ankle dorsiflexion dorsiflexion leg pain (Homan’s sign), may also have signs of fever and tachycardia. However, the symptoms of long-distance runners when the disease may not be typical. The two DVT cases reported in this paper were initially misdiagnosed as intramuscular hematomas and Baker’s cysts. Case 1: Male, 34 years old, started marathon run training seven years ago and ran 80 miles a week. After a marathon five days after finishing with a 2:39 grade result, the right ankle was rapidly inverted 2 times in a row when there was no running on the rugged road. There was no obvious injury,