I think Andreas had a similar question before. I believe the response was that liver flushing is in order. I had a friend with similar lumps and it was toxic stuff choosing the wrong route out, but certainly liver was strongly indicated in his case. It may take a number of flushes to influence the lumps.
Best wishes,
Janaki
...Whoops, meant to say that the lump appearing after a surgery could be due to medications taken at that time.