Fig. 3From: The prognostic value of serum CA 19-9 for patients with advanced lung adenocarcinomaKaplan–Meier curves for overall survival in patients with advanced stage disease, by (a) serum CA 19-9 positivity; and (b) both serum CA 19-9 and serum CYFRA 21-1 (Double −: neither marker; Single +: one marker; Double +: both markers)Back to article page