Traumatic subtotal hyphema in a child with vitamin K deficiency.

Factors II, VII, IX· and X, and proteins C and S are synthesized in the liver by a process that is dependent on vitamin K. When vitamin K is deficient, hemorrhagic disturbances can occur. Hyphema has not been previously described in patients with vitamin K deficiency and consequent low levels of factors VII, IX and X. We describe a case of traumatic subto­ tal hyphema in a child in whom further investigation revealed deficiency of vitamin K-dependent factors. CASE REPORT