The analysis also revealed that low CCBL2 expression was associated with low RFS in patients with ER-positive BC (p = 0.0310), PR-positive BC (p = 0.0340), luminal A BC (p = 0.0400), and infiltrating ductal carcinoma (p = 0.0004) (Fig 6). This evidence concerns the gene PGR and invasive ductal breast carcinoma.