Affiliation:
1. College of Medicine, The University of Vermont, Burlington, Vermont;
2. Division of Dermatology, The University of Vermont, Burlington, Vermont;
3. Department of Pathology, The University of Vermont, Burlington, Vermont
Abstract
BACKGROUND
Treatment option decisions for low-risk squamous cell carcinoma in situ (SCCIS) are hampered by a paucity of management-type–specific outcomes data.
OBJECTIVE
Describe SCCIS tumor outcomes managed by watchful waiting and risk factors associated with poor cancer outcomes.
MATERIALS AND METHODS
Retrospective cohort study. Setting: Single academic hospital in a rural setting. Patients: Adults with SCCIS diagnosed between January 01, 2014, and December 31, 2016. Main Outcomes and Measures: Hazard ratios (HRs) for local recurrence (LR), nodal metastases (NM), distant metastases (DM), and disease-specific death (DSD).
RESULTS
A total of 411 consecutive SCCIS tumors that were considered clinically resolved at follow-up and managed with watchful waiting were included. Seventeen tumors recurred locally. No instances of NM, DM, or DSD were identified. Multivariate analysis found that solid-organ transplant recipient status conferred the highest risk of local recurrence [HR, 9.979 (95% CI, 2.249–39.69)]. Additional risk factors predicting LR include anatomic location on the vermilion lip or ear [HR, 9.744 (95% CI, 1.420–69.28)], anatomic location on the head and neck [HR, 6.687 (95% CI, 1.583–36.15)], and a biopsy with tumor extending to the deep edge [HR, 6.562 (95% CI, 1.367–39.04)].
CONCLUSION
Watchful waiting for SCCIS with a clinically resolved biopsy site has a local recurrence rate of 4%.
Publisher
Ovid Technologies (Wolters Kluwer Health)