Endocrine

Hyperprolactinaemia

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Pathology

Elevated prolactin levels

Aetiology

Physiological: Stress, pregnancy, breast feeding
Drugs: Methyldopa, metoclopramide, haloperidol, oestrogen
Malignancy: Microprolactinoma (<10mm diameter) or Macroprolactinoma 
(>10mm diameter)

Signs

Visual defects

Symptoms

Reduced/absent menstruation, galactorrhoea, breast tenderness, headaches, lack of libido, sub-fertility, erectile dysfunction.

Investigations

Bloods: Serum prolactin, pituitary function, TFTs, 
Special tests: Visual field assessment
Imaging:  MRI pituitary.

Treatment

Medical: Stop offending drugs, Dopamine agonist therapy with bromocriptine or 
cabergoline to normalise prolactin if malignancy
Surgical: Trans-sphenoidal surgery

Prognosis

Usually good prognosis
Osteoporosis

Key Facts

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Key References

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