Patterns of major surgeries among patients diagnosed with cutaneous squamous cell carcinoma (CSCC).

e21034 Background: CSCC is the second most common skin cancer. Most CSCC cases can be cured with surgical excision alone (5-year cure rate > 95%). We sought to evaluate patterns of major surgeries among patients with CSCC, overall and among those requiring systemic therapy. Methods: From Truven MarketScan claims data, we identified patient’s first CSCC diagnosis between 2013 and 2018 and required that they be continuously enrolled in their healthcare plan and have no CSCC diagnosis in the previous 12 months. Major surgeries included facial excisions over 3.1 cm, parotidectomy, removal of ear/eye/nose, amputations, craniectomy, excision of extracranial nerves, sentinel lymph node biopsy, lymphadenectomy, complex repairs of over 7.5 cm, integra, free flaps, and large grafts over 20 sq cm. Risk of a major surgery was assessed using Kaplan-Meier estimators for patients with CSCC overall and for those who received prior or concurrent systemic therapy, stratified by immune status. Results: A total of 240,122 patients with CSCC (mean age [SD]: 67.7 [12.9] years; male: 56.5%; immunocompromised: 12.4%) were identified with a mean (SD) follow-up of 1.34 (1.15) years. Risk of major surgery (95% confidence interval [CI]) at 1 and 2 years was 15.1% (14.9–15.2) and 18.6% (18.4–18.8), respectively. 782 patients received prior or concurrent systemic therapy, of which 22.4% (n = 175) were immunocompromised. Among those who received systemic therapy, 1- and 2-year risks (95% CI) were 8.4% (5.8–11.0) and 14.2% (10.0–18.2) for immunocompetent and 14.1% (7.7–20.0) and 19.3% (10.7–27.0) for immunocompromised patients, respectively. Conclusions: Over 2 years, approximately one in five patients with CSCC will undergo at least one major surgery. Prior or concurrent treatment with systemic therapy did not appreciably diminish the risk of requiring major surgery. For patients who received systemic therapy, the 1-year and 2-year risk of major surgery was higher for immunocompromised patients compared to immunocompetent patients.