tumor By Ivan Suarez Robles 17 Nov, 2010 An abnormal mass of tissue that is not inflammatory, possesses no real function, and is the result of uncontrolled cell growth.Related Articles: Stem Cell Research Provides Insight on HD Development and Potential Therapeutic TargetsGlossary: anti-tumor drugComplications of Huntington's DiseaseThe Huntington's Disease PipelineHistones and HDAC Inhibitors