Skip to main content
An official website of the United States government
Español
Government Funding Lapse
Because of a lapse in government funding, the information on this website may not be up to date, transactions submitted via the website may not be processed, and the agency may not be able to respond to inquiries until appropriations are enacted.

The NIH Clinical Center (the research hospital of NIH) is open. For more details about its operating status, please visit cc.nih.gov.

Updates regarding government operating status and resumption of normal operations can be found at opm.gov.

extramedullary myeloid tumor

(EK-struh-MED-yoo-LAYR-ee MY-eh-loyd TOO-mer)
A rare type of cancer that is made up of myeloblasts (a type of immature white blood cell) and forms outside the bone marrow and blood. The tumor cells may look green when viewed under a microscope. Extramedullary myeloid tumors can occur anywhere in the body. They most commonly occur in people with acute myeloid leukemia or a myeloproliferative disorder. Also called chloroma, granulocytic sarcoma, and myeloid sarcoma.
Search NCI's Dictionary of Cancer Terms