###Human: I have a hard lump on left lower back between hip bone and ribs. Is this a sign of kidney cancer? ###Assistant: Hello. I have seen the picture. (attachment removed to protect patient identity). Looking at the location you pointed there should be no lump ideally in that area as it is purely muscular. Having said that, in your case since you had a fall at that point last year, possibly a hematoma has formed and not totally dissolved due to lack of movement or physiotherapy. This is quite normal and not worrisome. Chances of kidney cancer if it is painless, are actually one in a million if you have no other symptoms especially urinary symptoms. I would recommend an ultrasound abdomen-pelvis once feasible.