Survival impact of treatment utilization and margin status after resection of adrenocortical carcinoma.

BACKGROUND

This study examines the combined impact of margin status and adjuvant therapy utilization on overall survival (OS) for adrenocortical carcinoma (ACC) patients undergoing surgery with curative intent.

METHODS

The 2004-2020 National Cancer Database (NCDB) was queried for ACC patients ≥18yrs undergoing curative surgery (no debulking), subdivided into R0 and R1/R2-groups, and analyzed using inverse-probability-weighted Cox Proportional Hazard-model.

RESULTS

Of 5023 ACC patients, 3193 underwent curative surgery, 2213 (69 ​%) had R0 margins. Compared to the R0, the R1/R2 group had a decreased OS by 15.6 months (HR ​= ​1.89, p ​= ​0.002). While there has been no significant improvement in margin status over the years studied (2008-2017), there has been an overall increase in the proportion of patients receiving adjuvant therapy regardless of margin status, and the adverse impact of a positive margin on survival has decreased [HR 2.20 vs 1.76]

CONCLUSIONS

R1/R2 margins are associated with decreased OS. The adverse impact of R1/R2 margins on OS decreased over time while adjuvant therapy utilization increased for all patients.