question: HI Doctor,My brother had a sever stomach pain in the right and back side of the Stomach. We went to a doctor and he gave a injection and pain killer where in he got omitting.Then doctor asked us to go for a scanning where in they diagnosed it as a kidney stone  that is of 0.6mm and effecting the surrounding areas.Then they asked us for CT Scan where in the report is as belowa preliminary A>P scanogram of the abdomino-pelvic regions was first made. spiral scans were made through KUB reagions. emplying 8mm sections and wide latitide in wimbdow settiong coronal reconstructions were also performed.both the kindly are normal in location, orientation and size and shape and attenuations.on the right side of the mild pelvicalyectasia with ureteric ecatasis is noted down to the upper L3 level at which point loged on a nodular focus of cacific hyperattenuations of up to186HU in attenuation values and about 0.40x0.38x0.73cm in diameters distal to thus the right uerter grossly appears normal.the appendix is retrcaecal/retrocoloc in orientation and measuring approximately 0.6cm in diamiter and normal.Please let me me know the reason and what action is required. IS a surgery nessecary ?