D2I2.
genetic

Protein S deficiency

S is a disorder associated with increased risk of . Protein S, a vitamin K-dependent physiological anticoagulant, acts as a nonenzymatic cofactor to activate protein C in the degradation of factor Va and factor VIIIa.

Underlined words are explained — tap any of them.

Symptoms — what it feels like

  • ·Purpura fulminans

Causes — why it happens

  • ·Vitamin K

How it's found

  • ·Coagulation test

Treatment

  • ·Heparin,
Plain-language summary adapted from Wikipedia. Not medical advice.