<s>[INST] hi, im mrs. srikanthan, my son, 3yrs old, got a lump on his inner elbow on 2.2.2014 night was only it was visible, he was at a play pen during the day and its painless. we consulted a paediatric surgeon and was suggested for an ultra sound scan. in that its not visible and he assumes that it can be cancer, however to operate and take it out and get it etsted before deciding on anything?also please note we are treating him now for epilepsy, whci last only max 6-10secs and he has no pain with regard to that, if hes eating or drinking or do whatever he continues to do the same, medication carried out now for 2 months (rivotril) and thank god he didnt get it again and controlled.require some advice. am i to go for the surgery for my son? what are chances of being cancer? being a mother im nervous on this topic. [/INST] Hi. Cancer per se at this age are very rare and needs proper evaluation before a decision is taken. It is a possibility that he might have a trauma during play, falling, epilepsy attack or so. If the lump is not visible in USG, it can be conformed by MRI. The best way is to go for an x-ray- can show old fracture or outgrowth of bone (common in this age group). If this lump is palpable, one can always go for multiple FNAC- fine needle aspiration cytology-may help if not hemorrhagic. The dictum is to think of the commonest possibilities first and remember the rare possibility too. </s>