Sodium phosphate P32 may be used to treat which condition?

Sodium phosphate P32 is a radioactive isotope that is primarily utilized in the treatment of certain hematologic disorders, particularly in polycythemia vera. This condition is characterized by the overproduction of red blood cells, which can lead to increased blood viscosity and a higher risk of thrombosis.

The mechanism of action for sodium phosphate P32 involves its beta-emitting properties, which help to reduce the proliferation of hematopoietic cells in the bone marrow. By delivering localized radiation, P32 effectively reduces the number of red blood cells produced, thereby alleviating the symptoms and complications associated with polycythemia vera.

In the context of other conditions listed, while various treatments exist for multiple myeloma, leukemia, and aplastic anemia, they do not specifically employ sodium phosphate P32 as a standard treatment option. Thus, using this isotope aligns particularly well with the therapeutic goals for polycythemia vera, making it the correct choice.