A Prospective Study of the Spectrum of Haematological Disorders in Patients With Extrahepatic Portal Vein Obstruction

Extrahepatic portal vein obstruction (EHPVO) is a non-cirrhotic cause of portal hypertension that results from a thrombotic blockade in the portal vein outside the liver. The preserved hepatic parenchyma distinguishes EHPVO from intrahepatic causes of portal hypertension. However, complications like variceal bleeding, hypersplenism, and splenomegaly remain common. Hematological abnormalities frequently observed in EHPVO include thrombocytopenia, anemia, and leukopenia, often attributed to hypersplenism. Yet, in a subset of patients, especially those with concurrent myeloproliferative neoplasms (MPNs), these cytopenias may be masked due to increased production of blood elements. Coagulation profiles may also show subtle abnormalities or evidence of underlying thrombophilia.A growing body of literature suggests a strong association between EHPVO and underlying prothrombotic conditions such as MPNs (often linked to JAK2V617F mutation), antiphospholipid syndrome (APS), and paroxysmal nocturnal hemoglobinuria (PNH).

Early identification of these disorders may significantly impact clinical management, prognosis, and long-term surveillance. The current study is a cross-sectional observational analysis aiming to investigate the hematological spectrum in patients with EHPVO at Assiut University Hospital. Data will be collected retrospectively from medical records, including CBC with differential, liver function tests, coagulation parameters, and specific thrombophilia workups when available. The primary objective is to correlate these laboratory findings with underlying hematological disorders. Secondary aims include evaluating the association between these abnormalities and clinical outcomes such as variceal bleeding, transfusion needs, and prognosis. The study may offer valuable insights into risk stratification and highlight the importance of thrombophilia screening in this patient population.