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Pituitary Prolactinoma — SCE Neurology MCQ

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HardNeuro-oncologyPituitary ProlactinomaSCE Neurology

A macroadenoma compresses the optic chiasm and prolactin is 8,500 mU/L after macroprolactin and medicine causes are excluded. Vision is stable without apoplexy. What is first-line treatment?

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Correct answer: A — Start cabergoline with endocrine and neuro-ophthalmic monitoring, after confirming the indication

The best answer is “Start cabergoline with endocrine and neuro-ophthalmic monitoring, after confirming the indication”. Dopamine agonist therapy usually lowers prolactin and shrinks even large prolactinomas rapidly; surgery is reserved for selected resistance, intolerance or emergencies. “Proceed directly to trans-sphenoidal surgery in every macroprolactinoma” remains a plausible alternative in a different presentation, but it does not fit the decisive finding or management threshold here. “Use radiotherapy before confirming response to dopamine agonist treatment” remains a plausible alternative in a different presentation, but it does not fit the decisive finding or management threshold here. “Observe until irreversible visual-field loss develops” remains a plausible alternative in a different presentation, but it does not fit the decisive finding or management threshold here. “Treat with somatostatin analogue because prolactin is a growth-hormone marker” remains a plausible alternative in a different presentation, but it does not fit the decisive finding or management threshold here.

Reference: Pituitary Society international consensus statement on prolactinoma: https://pubmed.ncbi.nlm.nih.gov/37670148/