Lower extremity deep vein thrombosis after heavy exertion.

A young woman leading a sedentary life, travelled on foot for a distance of 25 km in a day. The following day she noticed pain and swelling of left foot and left leg. She got no relief with analgesics and her orthopaedic evaluation was normal. Her clinical examination was normal except for local swelling, oedema and tender calf. Her haematological and biochemical examination was normal except for mild elevation of creatine phosphokinase. A Doppler ultrasound revealed the thrombosis of anterior tibial vein and popliteal vein.