Compared with the ALND group, the SLNB group had a higher proportion of patients with three positive lymph nodes (63.1% versus 43.1%, p < 0.001), CCI score of 0 (87.4% versus 84.4%, p = 0.001), pT1 tumor (42.8% versus 35.4%, p < 0.001), well-to-moderately differentiated tumor (72% versus 66.9%, p < 0.001), absence of LVI (42.7% versus 36.3%, p < 0.001), negative surgical margins (94.3% versus 91.9%, p < 0.001), PR-positive (68.4% versus 54.1%, p < 0.001), and lobular histology (16.5% versus 12.7%, p < 0.001) (Table 1). Here, PGR is linked to neoplasm.