Clinical features and survival of patients with multiple primary malignancies

Table 2 The most common multiple primary malignancies in patients with two malignancies

Malignancies	Total	Synchronous MPM	Metachronous MPM	Median OS in mo
NSCLC and breast cancer	12	2	10	79.8
NSCLC and gastric cancer	10	0	10	16.7
Colorectal cancer and gastric cancer	10	3	7	Not reached
Esophageal cancer and gastric cancer	9	6	3	36.2
NSCLC and bladder cancer	7	2	5	31.2
NSCLC and cervical cancer	6	1	5	35.5
NSCLC and thyroid cancer	6	2	4	Not reached
NSCLC and colorectal cancer	6	1	5	Not reached
NSCLC and esophageal cancer	6	3	3	Not reached

MPM: Multiple primary malignancies; NSCLC: Non-small cell lung cancer; OS: Overall survival.