Fig. 4From: Prognostic value of functional SMAD4 localization in extrahepatic bile duct cancerKaplan–Meier survival curves for 14 patients with lymph node metastasis. a Recurrence-free survival stratified by SMAD4 expression at the metastatic lymph node. b Overall survival stratified by SMAD4 expression at the metastatic lymph node. Black line, SMAD4 absent group; dashed line, SMAD4 present groupBack to article page