PRL and hyperprolactinemia: The proportion of patients with hyperprolactinaemia (36.29% vs. 35.25%, p > 0.05, Figure 2C) and mean serum PRL levels (23.34 ng/mL vs. 24.08 ng/mL, p > 0.05 Figure 2C) were not significantly different between malignant and benign lesions in premenopausal women.