Postthrombotic Syndrome: Or something else? Differential Diagnosis

Cardiovascular System (I00-I99).

• Leg edema in heart failure – water retention in the legs due to heart failure.
• Ulcus cruris arteriosum – lower leg ulcer caused by arterial occlusive disease.

Genitourinary system (kidneys, urinary tract – reproductive organs) (N00-N99).

• Leg edema in renal insufficiency (kidney weakness).

Further

• Leg swelling, unspecified