As per your query,it looks like Abscess
which got turned into Antibioma after Antibiotics.
Scan just reveals a swelling ,but not the nature of the swelling.
The correct diagnosis will be obtained only after histopathological examination ,i.e.after biopsy
You can wait for a week as it is not an emergency condition.
Get it removed after 1 week and get correct diagnosis
Wish you good health