A 45-year-old male presents with calf pain for the past 7 days.  The patient denies any trauma, prolonged travel or prior history of DVT.  On exam, his vitals are stable.  His right calf is 4.5 cm larger than his left calf.  He has a positive Homan's sign on the right.  You perform a venous compression examination and note the following in the popliteal region...

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