MKI67 and pancreatic insulinoma: Sporadic solitary insulinomas with a diameter of less than or equal to 20 mm, a minimum distance of 1 mm from the main pancreatic duct, and a Ki-67 value of less than 5% on EUS-guided cytology or from a biopsy sample may be the best candidates for this procedure, which was the condition considered in this meta-analysis.