Good day. Why was the reason for CT scan? If the CT scan done earlier was done for some other reason, they wouldn't have taken finer cuts of adrenal. So in that case, a proper adrenal specific CT with finer cuts will be needed.
Adrenal adenomas are usually benign, however, rarely malignancies can occur. These adenomas are quite common after 40 years of age. What you have is a 17 mm ( 1.7 cm) adenoma. Any adenoma above 4 cm in size should be removed .
Now the task is to see if this adenoma is secreting any hormones and to rule out malignancy. A CT scan with out contrast will tell you the density of adenoma. (They look at Hornsfield unit
( HU) for density. the higher the density, the higher chances of malignancy). Occasionally a fine needle aspiration ( FNA) also may be required if suspicious on next CT scan
Your doctor will also arrange for hormone tests to see if this adenoma is secreting hormones in excess.