Table 2 Outcome of the investigations of 231 incidentalomas in the study population (n = 194)

BENIGN NON-HYPERFUNCTIONING TUMOURS

160 (94%)

N/A^b

 Adenomas

154 (91%)

N/A

 Myelolipoma

3 (1.8%)

N/A

 Ganglioneuroma

1 (0.6%)

Diagnosis through PAD^c.

Surgery.

 Hemorrhagic cyst

1 (0.6%)

Diagnosis through PAD.

Surgery.

 Hematoma

1 (0.6%)

Malignant or functioning tumours

3 (1.8)

N/A

 Cortisol hypersecretion

2 (1.2%)

1 patient underwent surgery due to Cushings syndrome, and PAD showed adrenal hyperplasia.

Surgery (n = 1).

1 patient s were diagnosed with subclinical Cushing but not judged to benefit from surgery and therefore conservatively treated

Conservative treatment (n = 1)

 Pheochromocytoma

1 (0.6%)

Confirmed with PAD

Surgery.

No adrenal tumour

6 (3.5%)

Further investigation diagnosed: sarcoma (n = 1), renal cyst (n = 1), ventricular gut diverticulum (n = 1), pleating of the tail of pancreas (n = 1), accessory spleen (n = 1), and no tumour-like structure was found in the adrenal CT (n = 1).

Referred to another department (n = 1, Department of Sarcoma).

Surgery due to large tumour size, where PAD showed an accessory spleen (n = 1).

Unknown

62 (N/A)

Unknown diagnosis due to absence of adequate follow-up (n = 43), death (n = 10) the patient declining further investigation (n = 6), or still ongoing investigations (n = 3)

N/A