History
Until the 1990s, all nonepithelial tumors of the gastrointestinal tract were called "gastrointestinal stromal tumors" from smooth muscle origin. Histopathologists generally did not distinguish between the types, as this did not affect either therapy or prognosis. Subsequently, CD34, and later CD117 were identified as markers that could distinguish the various types.
Read more about this topic: Gastrointestinal Stromal Tumor
Famous quotes containing the word history:
“History is the present. That’s why every generation writes it anew. But what most people think of as history is its end product, myth.”
—E.L. (Edgar Lawrence)
“The history of all hitherto existing society is the history of class struggles.”
—Karl Marx (1818–1883)
“English history is all about men liking their fathers, and American history is all about men hating their fathers and trying to burn down everything they ever did.”
—Malcolm Bradbury (b. 1932)