Francesca Marini, Ettore Luzi, and Maria Luisa Brandi reviewed the role of miRNAs in thyroid cancer development in the paper titled “MicroRNA role in thyroid cancer development.” Growth factors play a role in thyroid proliferation and function, while EGF acts as a mitogen for thyroid cells inhibiting also thyroid differentiation. The gene discussed is EGF; the disease is thyroid cancer.