Figure 2From: Diagnostic pitfalls of hyperprolactinemia: the importance of sequential pituitary imagingFrequency distribution according to serum prolactin concentration in patients with prolactinoma. Serum prolactin concentration in most patients was around 100 ng/ml. Fifty-three (55.8%) patients presented the serum prolactin concentration lower than 200 ng/ml (38.56 – 197.7 ng/ml) (the dark bar graph).Back to article page