,” Ashlyn Smith, PA-C, of Endocrinology Associates, Scottsdale, Ariz., said in a presentation at the at the virtual meeting of the annual Metabolic and Endocrine Disease Summit held by Global Academy for Medical Education.
The most common demographic for pituitary disorders is women in their 30s and 40s, Ms. Smith said. Early red flags for pituitary problems include patients presenting with headaches and/or blurred or double vision, which could signal bitemporal hemianopsia, she said.
Roughly two-thirds of pituitary adenomas are functional, meaning that they secrete pituitary hormones and cause clinical syndromes, Ms. Smith said. The most common reason for hypersecretion is hyperprolactinemia, she said.
Hyperprolactinemia, like most pituitary conditions, is more common in women than men, Ms. Smith noted. However, symptoms may include not only galactorrhea, but also gynecomastia, and hypogonadism, which may be red flags in men, she noted.
“Prolactin inhibits the gonadal pathway, so we see low gonadal hormones. For example, if men present with atypical hypogonadism for their age, or women present with changes in the menstrual cycle, check the prolactin levels,” she said.
The etiologies of hyperprolactinemia include physiologic reasons such as breastfeeding and pregnancy, as well as intercourse and breast manipulation, stress, and sleep issues. Pathologic reasons for prolactin elevation include prolactinoma, gonad-hormone secreting tumor, hypothyroidism, and renal insufficiency, Ms. Smith said.
Evaluation of patients with suspected hyperprolactinemia includes screening for physiologic causes, renal function and thyroid function tests, and a thyroid-specific MRI. Ordering a dedicated MRI of the pituitary gland is important to help identify compression of the optic nerve, noted Ms. Smith.
A medication review also is essential in evaluating hyperprolactinemia, and especially in the setting of the COVID-19 pandemic, because patients may have made changes to psychiatric medications, said Ms. Smith. Neuroleptics and antipsychotics including risperidone, haloperidol, chlorpromazine, and thiothixene can be associated with hyperprolactinemia, as can benzodiazepines and various analgesics and antidepressants, she said.
Treatment in cases of medication-induced hyperprolactinemia can be challenging if the patients are unable to change a medication, said Ms. Smith. However, patients with hypogonadism or low bone mineral density who can’t change medications may benefit from exogenous gonadal hormones, she said.
Some patients with hyperprolactinemia benefit from treatment with dopamine agonists, which may ease symptoms and reduce the size of the prolactinoma, she explained. However, patients on dopamine agonists should be alert to side effects including constipation and orthostasis. Ms. Smith said she recommends that patients on dopamine agonists for hyperprolactinemia take the medication at night so they are lying down if orthostasis occurs.
Monitor prolactin levels at 1 month, and taper or discontinue if the prolactin returns to normal and the adenoma resolves, which can take approximately 2 years, she said. Ms. Smith then advised follow-up every 3 months for 1 year, then annual prolactin checks.
The risk of recurrence ranges from 26% to 69%, Ms. Smith said, and is higher in patients with higher prolactin levels and larger adenomas, she noted. Recurrence is most likely within a year of withdrawal from treatment, she said.
Ms. Smith disclosed serving as an adviser and speaker for Abbott Nutrition, a speaker for Xeris Pharmaceuticals, and an adviser for Sanofi and Radius.
Global Academy for Medical Education and this news organization are owned by the same parent company.
SOURCE: Smith A. MEDS 2020.