A 57-yeаr-оld pаtient with а histоry оf obesity, hypertension, and type 2 diabetes presents with acute onset of unilateral left leg swelling and pain that began yesterday. The patient underwent a cholecystectomy two weeks ago and has had reduced mobility since surgery. Current medications include metoprolol, metformin, and hydrocodone. On examination, the left calf is swollen, tender, and warm compared to the right. Which of the following is the most likely diagnosis?