USF-LVHN SELECT
An Internally Validated Prognostic Risk-Score Model for Disease-Specific Survival in Clinical Stage I and II Merkel Cell Carcinoma.
Publication/Presentation Date
10-1-2022
Abstract
BACKGROUND: Merkel cell carcinoma (MCC) is a rare cutaneous malignancy for which factors predictive of disease-specific survival (DSS) are poorly defined.
METHODS: Patients from six centers (2005-2020) with clinical stage I-II MCC who underwent sentinel lymph node (SLN) biopsy were included. Factors associated with DSS were identified using competing-risks regression analysis. Risk-score modeling was established using competing-risks regression on a training dataset and internally validated by point assignment to variables.
RESULTS: Of 604 patients, 474 (78.5%) and 128 (21.2%) patients had clinical stage I and II disease, respectively, and 189 (31.3%) had SLN metastases. The 5-year DSS rate was 81.8% with a median follow-up of 31 months. Prognostic factors associated with worse DSS included increasing age (hazard ratio [HR] 1.03, p = 0.046), male sex (HR 3.21, p = 0.021), immune compromise (HR 2.46, p = 0.013), presence of microsatellites (HR 2.65, p = 0.041), and regional nodal involvement (1 node: HR 2.48, p = 0.039; ≥2 nodes: HR 2.95, p = 0.026). An internally validated, risk-score model incorporating all of these factors was developed with good performance (AUC 0.738). Patients with ≤ 4.00 and > 4.00 points had 5-year DSS rates of 89.4% and 67.2%, respectively. Five-year DSS for pathologic stage I/II patients with > 4.00 points (n = 49) was 79.8% and for pathologic stage III patients with ≤ 4.00 points (n = 62) was 90.3%.
CONCLUSIONS: A risk-score model, including patient and tumor factors, based on DSS improves prognostic assessment of patients with clinically localized MCC. This may inform surveillance strategies and patient selection for adjuvant therapy trials.
Volume
29
Issue
11
First Page
7033
Last Page
7044
ISSN
1534-4681
Published In/Presented At
Shannon, A. B., Straker, R. J., 3rd, Carr, M. J., Sun, J., Landa, K., Baecher, K., Lynch, K., Bartels, H. G., Panchaud, R., Keele, L. J., Lowe, M. C., Slingluff, C. L., Jameson, M. J., Tsai, K. Y., Faries, M. B., Beasley, G. M., Sondak, V. K., Karakousis, G. C., Zager, J. S., & Miura, J. T. (2022). An Internally Validated Prognostic Risk-Score Model for Disease-Specific Survival in Clinical Stage I and II Merkel Cell Carcinoma. Annals of surgical oncology, 29(11), 7033–7044. https://doi.org/10.1245/s10434-022-12201-z
Disciplines
Medical Education | Medicine and Health Sciences
PubMedID
35867209
Department(s)
USF-LVHN SELECT Program, USF-LVHN SELECT Program Students
Document Type
Article