请将下列英文换一种语句表述方式Significantly tumor-associated glycan changes comprise increased branching of N-glycans higher density of O-glycans generation of truncated versions of normal counterparts Tn sTn and T

Tumor-associated changes in glycans are notable for their increased branching of N-glycans, higher density of O-glycans, and production of truncated versions of normal counterparts (Tn, sTn, and T antigens). Additionally, unusual forms of terminal structures containing sialic acid and fucose (sLea and sLex epitopes) are generated due to the genetic and epigenetic desregulation of glycogenes and the tumor microenvironment.