— Male 46 years old.

— Pain started a week ago at the knee.

— In a period of a 3 days he developed significant swelling from the knee to the ankle. The swelling was getting progressively worst until he came to the ER 7 days later.

— No history of thrombosis, trauma or surgery.

— No medications.

— He was sent to have a left lower extremity venous ultrasound.