Underutilization of Surgical Standard of Care for Insured Men with Invasive Penile Cancer.

PURPOSE: Prior studies of mixed insurance populations have demonstrated poor adherence to surgical standard of care (SOC) for penile cancer. We used data from the Surveillance, Epidemiology and End Results (SEER) cancer registry linked to Medicare to calculate SOC adherence to surgical treatment of penile cancer in insured men over the age of 65, focusing on potential social and racial disparities.
METHODS: This is an observational analysis of patients with T2-4 penile cancer of any histologic subtype without metastasis in the SEER-Medicare database (2004-2015). SOC was defined as penectomy (partial or radical) with bilateral inguinal lymph node dissection (ILND) based on the National Comprehensive Cancer Network guidelines. We calculated proportions of those receiving SOC and constructed multivariate models to identify factors associated with receiving SOC.
RESULTS: A total of 447 men were included. Of these men, 22.1% (99/447) received SOC while 18.8% (84/447) received no treatment at all. Only 23.3% (104/447) had ILND while 80.9% (362/447) underwent total or partial penectomy. Race and socioeconomic status (SES) were not associated with decreased SOC. Increasing age (OR 0.93, 95%CI:0.89-0.96), Charlson Comorbidity Index score ≥ 2 (OR 0.53, 95%CI:0.29-0.97), and T3-T4 disease (OR 0.34, 95%CI:0.18-0.65) were associated with not receiving SOC on adjusted analysis.
CONCLUSIONS: Rates of SOC are low among insured men 65 years of age or older with invasive penile cancer, regardless of race or SES. This finding is largely driven by low rates of ILND. Strategies are needed to overcome barriers to SOC treatment for men with invasive penile cancer.