A 38-year-old man presented with episodes of severe headache. CNS imaging shows evidence of coical sinus venous thrombosis (CSVT). His mother has history of spontaneous recurrent DVT of bilateral lower limbs. Which of the following testing is the least likely to be indicated in this patient?

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Vikas Bhardwaj
Medical Technologist, AIIMS New Delhi
Updated: Apr 17, 2026