A piece of tissue removed from a human body or other organism. "A piece of un-reshaped tissue" can be understood as a piece of tissue cut from human body or other living things, whose shape and structure are irregular and cannot be reshaped or shaped. Specifically, this tissue may be removed due to pathological changes, injuries, surgery and other reasons, such as tumors, wounds, surgically removed parts and so on. Because of its irregular shape, it can not be shaped or shaped like normal tissue, so it is called "a piece of non-plastic tissue". This tissue may need pathological examination or further treatment to determine its nature and treatment.