Essential thrombocytosis (ET) is one of the myeloproliferative neoplasms (MPNs) which increase the probability of thrombosis and bleeding. ET is usually discovered as an incidental finding on blood workup and in rare cases, will present as vascular events such as stroke. Our patient, a 77-year-old female, a case of acute cerebral infarct presented with numbness and severe weakness of left upper and lower extremity. Serial complete blood count showed an elevated platelet count. Bone marrow aspiration studies showed increased number of enlarged megakaryocytes. She was diagnosed as a case of ET and maintained on Aspirin 80 mg per tablet once a day and Hydroxyurea 500 mg per tablet once a day.