Basal cell carcinoma with bone invasion: A systematic review and pooled survival analysis.

Background: Although basal cell carcinoma (BCC) tends to follow an indolent course, some tumors can exhibit locally aggressive behavior and invade into bone.
Objective: To analyze all published demographic, clinical, and treatment data on recurrence patterns, disease progression, disease-specific death, and overall mortality of BCC with bone invasion.
Methods: A systematic review and pooled-survival analysis was performed, including case reports and case series of BCC with bone invasion.
Results: The study included 101 patients from 70 publications. BCC tumors invading into bone were most often large, neglected tumors located in high-risk face areas. At 5 years, patients had a 30% risk probability of disease recurrence (after negative margins), a 72.1% risk of disease progression or death (with ambiguous margin status), an 18.2% risk of BCC-related death, and a 20.7% overall probability of death.
Limitations: Limitations include the reliance on case reports and series for individual patient data, which has the potential to introduce selection bias.
Conclusion: The high rate of disease progression and suboptimal 5-year survival rate highlights the poor prognosis of BCC with bone invasion and further underscores the importance of early detection and treatment.
Competing Interests: Conflicts of interest None declared.
(Copyright © 2021 American Academy of Dermatology, Inc. Published by Elsevier Inc. All rights reserved.)