Table 2.
Location of metastases and characteristics within the entire cohort of NPC patients
| 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) | |
aThe percentages of patients with respect to the total of patients with metastasis at the corresponding locations.
bThe percentage of patients with respect to the total of patients with synchronous metastatic NPC.
cOthers include the spleen, kidney, pleura, breast gland, abdominal wall, and thyroid gland.