Observation or Interferon for nodular melanoma stage 3

Dear All,

My girl friend is only 29 years old and one months ago she diagnoised with nodular melanoma stage 3.

She did what she have to, she had the mole on her chest since she was young, she went to doctor to remove the mole last year March because it change color, and the lab report said is normal, and this year when it regrow again in May, she remove again, and the result still normal. The mole come back slightly in end of August, she removed it and one week later, there is lump under the area where the mole located. >.< She did what she have to to prevent but still the melanoma still penetrate through.

She didn't expose to sun too much and the area she has the mole is rare to sun expose.

PET CT shows clear else where the tumor is and slight reaction in the left axillary. She just had her operation 3 weeks ago to remove the tumor and 2 set of lymph nodes (18). They found one of the node has trace of melanoma. She is recovering.

The private hospital oncology doctor said she is young, there is no clinical trial in Hong Kong since it is a rare desease in HK too. He suggest using interferon alpha 2b.

The government hospital oncology doctor said the NCI guildline suggest observation rather than interferon and he didn't see much benefit with interferon since all these melanoma cases are from older age people which can tolerate the pain during treatment. She is the first one who is young.

She seems lose hope in western medicine since she did what the doctor told her to do and still end up like this.

Now I am confused with if she need to take interferon or just doing normal observation?

I am really lost