Table 1.

Detection results of EGFR gene mutation abundance from different body fluid sources

ID	Body fluid specimen	Mutation type	Blood abundance	Body fluid supernatant abundance	Body fluid sedimentary tumor cells abundance	Metastatic sites
1	Pleural effusion	21 L858R	0.4	34.88	3.54	Pleural effusion and multiple lungs metastases
2	Pleural effusion	21 L858R	22.8	39.61	3.25	Pleural effusion, and multiple brain and bone metastases
3	Pleural effusion	19 deletion	0.27	20.03	4.28	Pleural effusion
4	Pleural effusion	21 L858R	0.2	6.78	1.11	Pleural effusion
5	Pleural effusion	19 deletion	3.72	23.06	32.56	Ascites and multiple lung metastases
6	Pleural effusion	19 deletion	1.88	27.61	40.74	Pleural effusion and multiple bone metastases
7	Pleural effusion	19 deletion	1.88	36.8	36.2	Pleural effusion and bone metastases
8	Pleural effusion	21 L858R	1.04	3.54	1.79	Pleural effusion and liver metastases
9	Pleural effusion	21 L858R	3.13	23.41	38.42	Pleural effusion and lung metastases
10	Pleural effusion	19 deletion	0.8	7.08	8.53	Pleural effusion and lung metastases
11	Pleural effusion	21 L858R	0	44.98	3.13	Pleural effusion
12	Pleural effusion	19 deletion	0.81	41.65	16.91	Pleural effusion, and peritoneum and bone metastases
13	Pleural effusion	21 L858R	0.34	1.6	2.59	Pleural effusion
14	Pleural effusion	19 deletion	0.53	4.19	2.1	Pleural effusion and lung metastases
15	Pleural effusion	19 deletion	0	40.5	5.72	Pleural effusion
16	Ascites	21 L858R	0.37	31.7	3.07	Ascites and pleural effusion
17	Pericardium	19 deletion	4.83	2.94	1.03	Multiple bone and pericardium metastases
18	Pericardium	21 L858R	0.34	0.7	0	Pericardium
19	Cerebrospinal fluid	19 deletion	0	0.21	0	Meninges
20	Cerebrospinal fluid	19 deletion	0	18.05	2.96	Brain and meninges