<s>[INST] My father is 81 year old and on his ct scan a black spot was seen on his hip, I do not know if the right or the left, what could it be? He is havng a procedure done right now to removed a mass from one of his kidney and when they did the ctscan for this, is when they notice the black spot. I do not much because  am in California and he is in Texas. I got this information from my sister that is there with him right now. [/INST] HI, thanks for using healthcare magicI am sorry that your father is unwell.It is possible that the black spot that was seen represents a mass or defect in the bone.If the mass on the kidneys is malignant, it is possible that the black area on the bones represents spread to that area.The mass on the kidney would be sent to the lab for analysis to determine if it is  benign or malignant.You and your father should speak to his doctor.I hope this helps </s>