N1 Single lymph node metastasis, 2 cm or less in greatest dimension N1 Single regional lymph node metastasis in the true pelvis (hypogastric, obturator, external iliac or presacral lymph node ...

3 or more lymph nodes metastases less than 5 mm IA1 Confined to the cervix, diagnosed only by microscopy with invasion of < 3 mm in depth and lateral spread < 7 mm IA2 ...

You may have some other tests and scans to help with this. Stage 2 means the melanoma is only in the skin and there is no sign that it has spread to the nearby lymph nodes or other parts of the body.