Here, we performed 3′RNA‐sequencing with 111 leiomyomas that had been previously classified as negative for a MED12 mutation, HMGA2 overexpression, and FH‐deficiency by Sanger sequencing or immunohistochemistry.16, 17, 18, 19, 20. Here, MED12 is linked to hyperinsulinemic hypoglycemia, familial, 4.