Myeloid sarcoma

Myeloid Sarcoma

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Myeloid sarcoma

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Description:
A myeloid sarcoma (chloroma, granulocytic sarcoma, extramedullary myeloid tumor), is a solid tumor composed of immature white blood cells called myeloblasts. A chloroma is an extramedullary manifestation of acute myeloid leukemia; in other words, it is a solid collection of leukemic cells occurring outside of the bone marrow.

History

The condition now known as chloroma was first described by the British physician A. Burns in 1811, although the term chloroma did not appear until 1853. This name is derived from the Greek word chloros (green), as these tumors often have a green tint due to the presence of myeloperoxidase. The link between chloroma and acute leukemia was first recognized in 1902 by Dock and Warthin. However, because up to 30% of these tumors can be white, gray, or brown rather than green, the more correct term granulocytic sarcoma was proposed by Rappaport in 1967 and has since become virtually synonymous with the term chloroma.

Currently, any extramedullary manifestation of acute myeloid leukemia can be termed a granulocytic sarcoma or chloroma. Specific terms which overlap with granulocytic sarcoma include:
  • Leukemia cutis, describing infiltration of the dermis (skin) by leukemic cells, which is also referred to as cutaneous granulocytic sarcoma.
  • Meningeal......
  • ...

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