Background <p>Mastectomy and its associated treatments may alter shoulder biomechanics and soft-tissue integrity, yet their impact on total shoulder arthroplasty (TSA) outcomes remains unclear. This study evaluated short- and long-term complications following TSA in patients with a history of mastectomy.</p> Methods <p>A retrospective cohort analysis was performed using the TriNetX Research Network, including patients who underwent primary TSA. Individuals with a history of mastectomy were identified using procedural and diagnostic coding, and those with contralateral mastectomy and TSA were excluded. Propensity score matching 1:1 was performed to balance demographics and comorbidities. Ninety-day and two-year outcomes were compared between matched cohorts.</p> Results <p>After matching, 1,865 patients with prior mastectomy were compared with 1,865 controls. Patients with a history of mastectomy had a significantly higher incidence of postoperative lymphedema (3.48% vs. 0.67%; RR 5.15; <i>P</i> &lt; .0001). They also demonstrated increased risk of venous thromboembolism (4.56% vs. 3.11%; RR 1.47; <i>P</i> = .018). Overall postoperative infection rates were higher in the mastectomy cohort (3.96% vs. 2.70%; RR 1.47; <i>P</i> = .0378), including higher rates of cellulitis (2.81% vs. 1.72%; RR 1.63; <i>P</i> = .031). No significant differences were observed for 2-year outcomes.</p> Conclusion <p>Patients with a history of mastectomy undergoing TSA are at increased risk of perioperative postoperative lymphedema, thromboembolic events, and cellulitis. These findings highlight the importance of heightened perioperative surveillance.</p>

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Effect of prior mastectomy on outcomes following total shoulder arthroplasty

  • Akin Adio,
  • Tarishi Parmar,
  • Peter Boufadel,
  • Hafiz F. Kassam,
  • Adam Z. Khan,
  • John G. Horneff,
  • Brian W. Hill,
  • Joseph A. Abboud

摘要

Background

Mastectomy and its associated treatments may alter shoulder biomechanics and soft-tissue integrity, yet their impact on total shoulder arthroplasty (TSA) outcomes remains unclear. This study evaluated short- and long-term complications following TSA in patients with a history of mastectomy.

Methods

A retrospective cohort analysis was performed using the TriNetX Research Network, including patients who underwent primary TSA. Individuals with a history of mastectomy were identified using procedural and diagnostic coding, and those with contralateral mastectomy and TSA were excluded. Propensity score matching 1:1 was performed to balance demographics and comorbidities. Ninety-day and two-year outcomes were compared between matched cohorts.

Results

After matching, 1,865 patients with prior mastectomy were compared with 1,865 controls. Patients with a history of mastectomy had a significantly higher incidence of postoperative lymphedema (3.48% vs. 0.67%; RR 5.15; P < .0001). They also demonstrated increased risk of venous thromboembolism (4.56% vs. 3.11%; RR 1.47; P = .018). Overall postoperative infection rates were higher in the mastectomy cohort (3.96% vs. 2.70%; RR 1.47; P = .0378), including higher rates of cellulitis (2.81% vs. 1.72%; RR 1.63; P = .031). No significant differences were observed for 2-year outcomes.

Conclusion

Patients with a history of mastectomy undergoing TSA are at increased risk of perioperative postoperative lymphedema, thromboembolic events, and cellulitis. These findings highlight the importance of heightened perioperative surveillance.