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Table 2 Location of metastases and characteristics within the entire cohort of NPC patients

From: Subdivision of M category for nasopharyngeal carcinoma with synchronous metastasis: time to expand the M categorization system

Location and type of metastases

Number of patients (cases [%])a

Percentage (%)b

Bone

 Isolated bone metastasis

184 (65.9)

 

 Total bone metastases

333 (100.0)

65.9

 Number of lesions

  Single metastasis

74 (22.2)

 

  Multiple metastases

239 (71.8)

 

  Not specified

20 (6.0)

 

Lung

 Isolated lung metastasis

56 (41.2)

 

 Total lung metastases

136 (100.0)

26.9

 Number of lesions

  Single metastasis

42 (30.9)

 

  Multiple metastases

89 (65.4)

 

  Not specified

5 (3.7)

 

Liver

 Isolated liver metastasis

56 (36.1)

 

 Total liver metastases

155 (100.0)

30.7

 Number of lesions

  

  Single metastasis

43 (27.7)

 

  Multiple metastases

102 (65.8)

 

  Not specified

10 (6.5)

 

Distant lymph nodes

 Isolated lymph node metastases

10 (6.9)

 

 Total lymph node metastases

144 (100.0)

28.5

 Number of lesions

  

  Single metastasis

15 (10.4)

 

  Multiple metastases

112 (77.8)

 

  Not specified

17 (11.8)

 

Othersc

 Isolated metastasis

0 (0.0)

 

 Total number of other metastases

12 (100.0)

2.4

 Number of lesions

  Single metastasis

4 (33.3)

 

  Multiple metastases

2 (16.7)

 

  Not specified

6 (50)

 
  1. aThe percentages of patients with respect to the total of patients with metastasis at the corresponding locations.
  2. bThe percentage of patients with respect to the total of patients with synchronous metastatic NPC.
  3. cOthers include the spleen, kidney, pleura, breast gland, abdominal wall, and thyroid gland.