extramedullary hematopoiesis is characterized by the presence of hematopoietic tissue outside the bone marrow. extrathoracic extramedullary hematopoiesis is a rare and usually asymptomatic condition. we report a case of a 38-year-old female with paraspinal and presacral extramedullary hematopoiesis with polycythemia vera. clinical and laboratory evaluation, along with radiological and histopath...