I had a similar experience a few years ago. Primary on leg excised, I node positive, also did interferon. Intransit mets reoccurred on leg. My Onc recomended isolated limb perfusion (ILP), pretty agressive surgery but all that was available at the time. You may want to look into it. I would not recomend leaving the mets… I believe surgery is the most recomended option.
Best wishes
