Degrees of prolactin elevation by pathologic causes of hyperprolactinemia

Table 6.3-1. Degrees of prolactin elevation by pathologic causes of hyperprolactinemia
Cause of prolactin elevation	Typical range in serum
Idiopathic Pituitary stalk interruption Primary hypothyroidism Renal failure Liver failure Medications	20-100 ng/mL
Prolactinoma Medications Pituitary stalk interruption Primary hypothyroidism	100-250 ng/mL
Prolactinoma Medications Primary hypothyroidism	250-500 ng/mL
Prolactinoma	>500 ng/mL