Figure 2.

Kaplan–Meier curves of the local recurrence-free survival of patients with sacral chordoma.

Notes: (A) Stratified by Sam68 expression; (B) stratified by Ki-67 index; (C) stratified by Sam68/Ki-67 coexpression (low/low and others); (D) stratified by Sam68/Ki-67 coexpression (high/high and others); (E) stratified by tumor stage; (F) stratified by surrounding muscle invasion; (G) stratified by the type of tumor resection.

Abbreviations: EA, Enneking appropriate; EI, Enneking inappropriate.