“…Inclusion criteria and definition of reference standard differed from the imaging meta-analysis mainly in population selection criteria (as adrenal biopsy is not indicated in incidentaloma population but rather in patients at high risk for malignancy) and in reference standard (where we accepted imaging and clinical follow-up in addition to histopathology, as most metastases would not undergo adrenalectomy). We identified 32 studies (90,113,114,115,116,117,118,119,120,121,122,123,124,125,126,127,128,129,130,131,132,133,134,135,136,137,138,139,140) with a total of 2174 patients which reported at least one outcome of interest (complication rate, nondiagnostic rate, diagnostic accuracy parameters). Of these, only 8 studies (90,126,127,130,131,132,133,140) were included for the diagnostic accuracy analysis, reasons for exclusion being lack of any or optimal reference standard for at least 50% patients (n = 20) and more than 30% patients with nonadenomas in benign cohort (n = 4).…”