Background: Eltrombopag olamine (ELT) is a synthetic nonpeptide with a low molecular weight that has been investigated in various phase-3 studies and shown to be efficacious at a typical dose of 50 mg. Varied ethnic groups have reported different responses to ELT.Aim: The aim is to examine the efficacy of ELT in Asian and Arab patients with immune thrombocytopenia (ITP) from the Indian subcontinent by starting with (12.5 mg, as a minimum dose) and gradually increasing to a maximum dose of 50 mg.Methods: Between January 2015 and January 2019, we reviewed the electronic health records of non-Arab Asian (n = 17) versus Arab (n = 41) patients who were ≥18 years old, residing in Qatar, and with confirmed diagnoses with chronic ITP and under active treatment with a platelet count of 30,000/L, and bleeding symptoms. Following receiving ELT for three months or longer at various dosages, patients' response was examined.Results: After three months of ELT therapy, the response rate (platelet count of 50,000/L) was equivalent in non-Arab (88.2%) versus Arab (87.5%) patients. However, to achieve an adequate response, 26% of Arab patients required a lower dose of 12.5 or 25 mg, and 41.5% required a higher dose of 50 mg. Conclusion:In adult chronic ITP patients, ELT is typically well-tolerated and delivers the desired outcomes. In 67.5% of Arab patients, smaller dosages of ELT (12.5-50 mg) were helpful in sustaining acceptable PLT levels. This helps patients get the most benefit at the lowest feasible dose, reducing toxicity and expense.

Background: Thrombopoietin receptor agonists stimulate platelet production . Eltrombopag olamine (ELT) is alow molecular weight, synthetic nonpeptide agent thathas been studied in multiple phase 3 trials and proved efficacy at a standard dose of 50 mg. ELT exposure has been reported to be different in different ethnic descents. In East Asian ITP patients, the area under the curve (AUC) was reported to be more than 85% those of non-East Asian descent Objectives: The objective of this study is to evaluate the efficacy of ELT in Arab and Asian ITP patients of the subcontinent of India by using a lower starting dose (12.5 mg) and maximum (50 mg) doses of ELT than the standard starting dosing of (50 mg) and maximum of (75 mg) approved in the USA and Europe. Methods A retrospective study was conducted to evaluate the role of ethnicity (Arab and East Asians) in response to ELT among ITP patients by reviewing patients' electronic medical records between Jan 2015 - Jan 2019. A total of 58 patients were identified. We examined retrospectively Arab (n = 41) and non-Arab Asian (n = 17) patients who are 18 years and older in Qatar, with previously treated chronic ITP who had a platelet count of < 30 000 /L and who presented with bleeding manifestations. Patients' responses were evaluated after receiving ELT for 3 months or more, as well as their response to different doses of ELT (100, 75, 50, 25, 12.5 or any alternating doses e.g., 50/25). Results: The response rate (platelet count of ‡ 50 000 /L) after 3 months of ELT treatment was comparable in the Arab (87.5%) and non-Arab (88.2%) patients. 26% of the Arab patients required 12.5 or 25 mg and 41.5 % required 50 mg of ELT to achieve an acceptable response. In the Non-Arab Asian group 17.6% required 25 mg and 52.9% required 50 mg of ELT to achieve acceptable response. 22% of the Arab patients and 35.3% of the Non-Arab Asians patients required 75 mg or more of ELT to achieve acceptable control. Further sub-analysis of this data showed that 70% of the Arab patients who achieved complete response were females (14/20) whereas 33.3% (3/9) were Asian females. Two-third the Arab patients who achieved clinical remission were females whereas more than Two-third were non-Arab Asian males. Conclusion: ELT is generally well tolerated and effectively achieves target platelet counts in adult ITP patients. Low doses (12.5 - 50 mg) of ELT were effective in achieving and maintaining safe platelet counts in most Arab patients. This helps in achieving the maximum benefit for the patient at the lower possible dose to prevent toxicity. Tailoring treatment guidelines to match ethnic variations will help in providing a more cost-effective approach for both the patients and the health care system. Disclosures No relevant conflicts of interest to declare.

Polycythemia Vera (PV) is a clonal myeloproliferative disease characterized by an erythroid dominant trilineage proliferation of hematopoietic precursor cells. Acute coronary syndrome is known to occur in patients with PV. However, there are very rare reported cases of myocardial infarction upon the initial presentation of PV. We present such a case of a 37 years old male, with no known cardiovascular risk factors, who had an initial presentation of NSTEMI treated with drug eluting stent (DES). Later investigations revealed a diagnosis of Polycythemia Vera. Treatment strategies for MI in cases of myeloproliferative disease lacking clear guidance, further studies are needed in this matter.

Essential thrombocythemia (ET) is one of the myeloproliferative neoplasms, characterized by persistent thrombocytosis, platelets >450,000/μL, and evident clonal abnormalities like JAK2 V617F, MPL, CALR mutation and not fulfilling WHO criteria for MDS, CML, PV, and IDA. Here we report a 24-year-old female who presented with headache and was found to have thrombocytosis with a platelet count of 2,141 × 10 3 /μL, diagnosed as ET as per WHO criteria 2008; she required ICU admission and thrombocytapheresis with a favorable outcome.