Figure 2.

Survival times associated with different multiple primary malignant tumor groups. (A) The survival times for the synchronous or metachronous tumor groups from diagnosis of the first primary cancer. Synch: synchronous tumors, Metach: metachronous tumors. (B) The survival times for patients with digestive system tumors and tumors in other systems from diagnosis of the first primary cancer. (C) The survival times for the digestive system tumor and other systems tumor groups from diagnosis of the second primary cancer. Digestive: digestive system tumor group. Other: other systems tumor group, including the respiratory, hematopoietic, lymphoid and urogenital system, and breast. (D) The survival times of younger people (≤50 years old) and older people (>50 years old) from diagnosis of the first primary cancer in the metachronous tumor group. (E) The survival times for different interval times (≤60 vs >60 months) for the metachronous tumor group. (F) The survival times for different therapies for the metachronous tumor group from diagnosis of the first primary cancer. S-based: surgery-based comprehensive therapy, S-alone: surgical therapy alone. (G) The survival times for different therapies in the metachronous tumor group from diagnosis of the second primary cancer. S: surgical therapy; NS: no surgery.