60 year old male progressive bilateral lower extremity oedema for the past month.

Increased capillary hydraulic pressure

Hypoalbuminemia

Protein loss

Reduced albumin synthesis

Nephrotic syndrome
Protein-losing enteropathy

Liver disease
Malnutrition

Increased capillary permeability

Lymphatic obstruction or increased interstitial oncotic pressure

Lymph node dissection

Nodal enlargement due to malignancy

Hypothyroidism

Malignant ascites

Increased plasma volume due to renal sodium retention

Venous obstruction or insufficiency

Arteriolar vasodilation

Heart failure, including for pulmonale

Primary renal sodium retention

Cirrhosis or hepatic venous obstruction

Acute pulmonary edema

Local venous obstruction

Venous thrombosis
Venous stenosis

Chronic venous insufficiency (post-thrombotic syndrome)

Burns

Trauma

Inflammation or sepsis

Allergic reactions, including forms of angioedema

Adult respiratory distress syndrome

Diabetes mellitus

Interleukin-2 therapy

Malignant ascites