TABLE 2.

Thrombophilia Testing

Test	Percentage Testing Positive
Factor V Leiden mutation	7% (2/27)*
Prothrombin gene mutation	4% (1/27)†
APLS testing‡	4% (1/27)
Protein C deficiency§	0% (0/24)
Protein S deficiency§	0% (0/24)
Antithrombin III deficiency§	0% (0/20)
JAK2V617F mutation	0% (0/16)
Paroxysmal nocturnal hemoglobinuria	0% (0/6)

The results of thrombophilia testing among our cohort are described above.

*One patient was heterozygous and 1 patient was homozygous.

^†This patient was heterozygous.

^‡Testing included assessment for anticardiolipin antibodies, beta-2 glycoprotein I antibodies, and lupus anticoagulant. The 1 positive patient was subsequently found to be negative on repeat testing.

^§Tests were excluded if sent in the context of acute thrombosis or while a patient was on warfarin (for proteins C and S).