Ewing tumor

Ew·ing tu·mor

(yū'ing),

a malignant neoplasm which occurs usually before the age of 20 years, about twice as frequently in males, and in about 75% of patients involves bones of the extremities, including the shoulder girdle, with a predilection for the metaphysis; histologically, there are conspicuous foci of necrosis in association with irregular masses of small, regular, rounded, or ovoid cells (2-3 times the diameter of erythrocytes), with very scanty cytoplasm.

Synonym(s): endothelial myeloma, Ewing sarcoma

Ew·ing tu·mor

(yū'ing tū'mŏr)

A malignant neoplasm that occurs usually before the age of 20 years, about twice as frequently in males, and in about 75% of patients involves bones of the extremities, including the shoulder girdle, with a predilection for the metaphysis; histologically, there are conspicuous foci of necrosis in association with irregular masses of small, regular, rounded, or ovoid cells (2-3 times the diameter of erythrocytes), with very scanty cytoplasm.
Synonym(s): endothelial myeloma, Ewing sarcoma.

Ewing,

James, U.S. pathologist, 1866-1943.

Ewing sarcoma - Synonym(s): Ewing tumor

Ewing tumor - a malignant neoplasm that involves bones of the extremities, including the shoulder girdle, with a predilection for the metaphysis. Synonym(s): endothelial myeloma; Ewing sarcoma

Ew·ing tu·mor

(yū'ing tū'mŏr)

Malignant neoplasm that occurs usually before the age of 20 years, about twice as frequently in males, and in about 75% of patients involves bones of the extremities, including the shoulder girdle, with a predilection for the metaphysis. Also called Ewing sarcoma.