Thank you for asking Healthcare majic.
My name is Dr Ehsan Ullah &
I have gone through your query.
you have mentioned that you have lump o your ankle and Doctor saw that , did
Ultrasound and you have been told that it's Fatty deposit ...
Fatty deposits are known as
Lipoma and they are benign conditions so you need not to worry about those .
If it's giving discomfort or you have some issue due it regarding cosmesis then you can consult your physician for its removal which is via surgical procedures.
Other conditions which cause lumps on Ankles include
Trauma
infection
Scar tissue
Bursitis
Cysts
Abscess
etc
Most of such Lumps are treated via Surgical excision except few cases where Antibiotics and other drugs can cure without Surgery like in Cases of infection and some small abscesses
Hope this may help you. Let me know if anything not clear.
Thanks.