34 Y/O with metastasized melenoma

Curious on some information.  My wife is 34 Y/O and was recently diagnosed with the above.  She  had no symptoms unitl she a lump in her left arm pit.  After meeting with several Dr's she had he lymp nodes removed from her left arm pit and a MET was found in her spleen.  We just had her speen taken out and by  PET scan she was clear of all disease.  Well the spleen was able to be removed laproscopically and while in the dr noted spots of concern on her liver.  Just trying to explore all treatment options for our next journey.  Thanks for any help

Spots on the liver should be biopsied, and the PET scan should be read again, or repeated with focus on the Liver.  Did they do a biopsy on the liver?

The spots were confirmed to be melenoma and we have not yet had another scan.  I did not know they could concentrate a scan i one particular area, is that true, and if so is it more high resolution.