Differential Diagnosis for DVT or Baker's Cyst

• Single most likely diagnosis
  • Deep Vein Thrombosis (DVT): This is the most likely diagnosis given the presentation, as DVT is a common condition that can cause swelling, pain, and warmth in the affected limb, which could be mistaken for a Baker's cyst.
• Other Likely diagnoses
  • Baker's Cyst: A fluid-filled swelling that causes a bulge and a feeling of tightness behind the knee, which can be mistaken for DVT due to similar symptoms such as swelling and pain.
  • Cellulitis: An infection of the skin and subcutaneous tissues that can cause redness, warmth, swelling, and pain, similar to DVT.
  • Muscular strain or injury: Can cause pain and swelling in the affected limb, potentially mimicking DVT or Baker's cyst symptoms.
• Do Not Miss (ddxs that may not be likely, but would be deadly if missed.)
  • Pulmonary Embolism (if DVT is present): A potentially life-threatening condition that occurs when a blood clot breaks loose and travels to the lungs.
  • Phlegmasia Cerulea Dolens: A severe form of DVT that can cause significant swelling, pain, and potentially lead to gangrene if not treated promptly.
  • Septic Arthritis or Osteomyelitis: Infections that can cause severe pain, swelling, and warmth, and if not treated promptly, can lead to serious complications.
• Rare diagnoses
  • Popliteal Artery Aneurysm: A rare condition where the artery behind the knee becomes enlarged, which can cause swelling, pain, and potentially lead to rupture if not treated.
  • Cystic Adventitial Disease: A rare condition where a cyst forms around the artery or vein, causing swelling, pain, and potentially leading to vascular compromise.