COL1A1 and neoplasm: Regarding the different subsets that express COL1A1, COL1A1_single, CD90_COL1A1, αSMA_COL1A1, and αSMA_CD90_COL1A1 were mostly detected in encapsulated metastases, suggesting this role of restraining the tumor progression already described in aforementioned publications.33, 34, 35