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A malignant neoplasm composed of anaplastic sympathicoblasts; occurs usually in the adrenal medulla of children.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.



a malignant tumor of nerve tissues, occurring most frequently in children. Classified as neuroblastomas are sympathicogoniomas, sympathicoblastomas, and ganglioblastomas. In most cases, neuroblastomas originate in the medulla glandulae suprarenalis, in the sympathetic trunk, and in the pelvic and abdominal divisions of the sympathetic nervous system.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.