Sir...the multiple swellings which you are describing can be multiple lipomas/ neurofibromas. They can sometimes increase in size and can become painful.
I can see you are apprehensive because your friend has been diagnosed with recurrent sarcomas
. The best way to get over this apprehension is to consult a doctor and get an FNAC (fine needle aspiration cytology) [ a test in which the material from the lump is aspirated and analysed under a microscope]. This test will make it clear whether your lesions are benign or malignant.
Your abdominal hernias
are unrelated to the present condition.