Merkel cell carcinoma overall survival based upon extent of disease

(A) Five-year OS of 9387 patients with Merkel cell carcinoma in the NCDB, stratified by local, regional nodal, and distant metastatic disease.

(B) Five-year OS of 5371 patients with Merkel cell carcinoma in the NCDB with pathological staging, including 1502 patients in stage group I, 493 in stage group IIA, 127 in stage group IIB, 1536 in stage group IIIA, 929 in stage group IIIB, and 784 in stage group IV.