Pituitary adenomas occur in 15% to 20% of normal subjects in autopsy and radiological studies.[3] Growth hormone secreting tumours make up around 20% of pituitary tumours.[4] Acromegaly is a rare condition with an insidious onset, often resulting in diagnostic delay.[5][6] The total prevalence ranges between 2.8 and 13.7 cases per 100,000 people, with an annual incidence rate between 0.2 and 1.1 cases per 100,000 people.[5] Acromegaly is often recognised in middle-aged men or women but can occur at any age.[5] The disease is equally distributed between both sexes.[7][3]

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