After bromocriptine treatment, the mean tumor diameter was reduced to 2.8 ± 1.7 cm (range: 0.9–6.6 cm), the mean cyst diameter was reduced to 1.2 ± 0.8 cm (range: 0.3–1.8 cm), and the mean PRL level was reduced to 1496.1 ± 1614.4 ng/mL (range: 1.55–5140.78 ng/mL). This evidence concerns the gene PRL and cyst.