Although OV ColClusters were not associated with overall survival, these findings suggest that the high collagen type I, fibrillar collagen, and high stroma OV-C1 group is similar to many Sarcoma (SARC) tumors that have relatively longer overall survival,while OV-C2 and OV-C3, clustered with SARC-C4, the SARC group with shorter overall survival, defined by minor collagens COL2A2 and COL4A5/A6. This evidence concerns the gene COL4A5 and sarcoma.