TABLE 1.
Tumor‐node‐metastasis staging for scalp angiosarcoma from the Japanese Dermatological Association Guidelines for Scalp Angiosarcoma
| T | Primary tumor |
|---|---|
| TX | Cannot be assessed |
| T1 | Smaller than or equal to 5 cm in maximum diameter |
| T2 | Larger than 5 cm in maximum diameter, or multiple lesions, or facial invasion |
| T3 | With skull base invasion |
| N | Regional lymph nodes |
|---|---|
| NX | Cannot be assessed |
| N0 | No regional lymph node metastasis |
| N1 | Regional lymph node metastasis |
| M | Distant metastasis |
|---|---|
| MX |
Cannot be assessed |
| M0 | No distant metastasis |
| M1 | Distant metastasis |
| TNM staging | |||
|---|---|---|---|
| I | T1 | N0 | M0 |
| Ⅱ | T2 | N0 | M0 |
| Ⅲa | T3 | N0 | M0 |
| Ⅲb | Any T | N1 | M0 |
| Ⅳ | Any T | Any N | M1 |