Abstract
Although indium-111 ((111)In) bone marrow scintigraphy is commonly used to assess bone marrow function, it plays a significant role in diagnosing extramedullary hematopoiesis (EMH) due to isotope accumulation in hematopoietic bone marrow. In our case, a 67-year-old man with polycythemia vera presented with an epidural tumor, for which EMH was considered a differential diagnosis. The diagnosis was subsequently confirmed by (111)In bone marrow scintigraphy. The tumors exhibited a reduction in size following radiation therapy. We report this case to highlight the utility of (111)In bone marrow scintigraphy in diagnosing EMH. This imaging modality can confirm epidural EMH and help avoid unnecessary surgeries.