Enhanced Disease-Specific Survival Among Individuals With Malignant Adnexal Tumors of the Skin Treated With Mohs Surgery: A National Database Study.

BACKGROUND Malignant adnexal tumors of the skin are a rare group of tumors that can be locally aggressive and require surgical excision with strict margin control to achieve clearance. Given the rarity of these tumors, there is a limited understanding within the medical community regarding optimal treatment approaches. OBJECTIVE To examine surgical management trends and outcomes for patients diagnosed with cutaneous adnexal tumors from 2000 to 2020. MATERIALS AND METHODS The Surveillance, Epidemiology, and End Results database was queried to identify biopsy-proven cases of cutaneous adnexal tumors between 2000 and 2020. Clinical and disease characteristics were examined, and disease-specific survivals were compared between surgical approaches using Kaplan-Meier curves and Cox proportional hazards models. RESULTS Mohs surgery demonstrated a significant increase in utilization from 2000 to 2020 (+447.1%) and improvements in disease-specific survival (mean 231.7 months; p < .001) compared with no surgery; wide local excision exhibited no improved disease-specific survival (227.7 months; p = .070). Multivariable Cox regression further highlighted that only Mohs surgery exhibited a reduced disease-specific mortality risk compared with no surgery (adjusted HR 0.49; p = .011). CONCLUSION Given the enhanced disease-specific survival coupled with tissue preservation strategies, Mohs surgery emerges as a promising surgical approach for the treatment of malignant adnexal tumors of the skin.