<s>[INST] i have a painless lump just below my left knee cap.  I didn't notice it until i kneeled down and thought I knelt on a frog and move my knee to a different point on the floor just to find the same sensation  I finally felt my knee cap and just below it there is another jello type knee cap.  what is it? [/INST] Respected user , HiThanks for using Healthcaremagic.comI have evaluated your query thoroughly .* This seems in relation with soft tissue lump may be sebaceous cyst or  lipoma .*  Strongly recommended to consult with a high resolution clinical     photograph  for  better insight .Hope this clears your query .Welcome  for  further  assistance .Regards . </s>