question: hi doctor, my father who is 54 years old his undergoing dialysis for two years. He has a cyst/lump on his arm but after a while it vanished and he noticed another lump on his leg and also on his genital area. He said it is not painful unless you press and put pressure. What do you think it is?do we need to worry and consult a doctor right away? thank you doctor hope you can enlighten me about this.