Additionally, we wanted to clarify if any of the factors studied could be of clinical relevance, and from that aspect also added expression of the cell cycle protein Ki‐67 in the analysis, as this factor previously has shown to be of prognostic significance for ACC tumours (Norberg‐Spaak, Dardick, & Ledin, 2000). Here, MKI67 is linked to adrenal cortex carcinoma.