What is the safest and best treatment for an indentation in my inner right thigh?

I am 55 years old with a very obvious indentation in my inner right thigh. My mother once told me this indentation developed because of an IV left in place for too long when I because ill as a child. The indentation is void of subcutaneous fat. As I am losing muscle mass, this dent is becoming more pronounced, even when wearing pants. I've thought about fat grafting, but I'm afraid the fat won't survive. I am becoming very depress, and would like to know if there is a more permanent solution.