<s>[INST] Have marble size lump hard to the touch and sore only when touched on right side of calf. Now developed a lump approximately 4 inches from ankle approximately silver dollars size on right leg on for only right side so leg and it is sore to touch. No bruising some redness should I be concerned re clots? I am 66 yrs [/INST] This one is a bursa or could be some benign tumor like condition like neurofibroma or sebaceous cyst! However it could be some abnormal growth too!Please go for an FNAC test to relieve your tension.All the best and regards, </s>