IGF2 and hemangiopericytoma: The most common tumours associated with IGF‐2‐mediated hypoglycaemia were fibrous tumours (N = 124, 53.2%), followed by non‐fibrous tumours originating from the liver (N = 21, 9%), hemangiopericytoma (N = 20, 8.5%) and mesothelium (N = 11, 4.7%).