Amenorrhoea and reversible infertility due to obstructive hydrocephalus: literature review and case report*

Abstract Background: Endocrine abnormalities are well-recognized consequences of intracranial pathology such as pituitary tumours. Less commonly, hydrocephalus may lead to dysfunction of the endocrine system, presenting as amenorrhoea or precocious puberty. We present a case report and literature review of hydrocephalus causing endocrine abnormalities including reversible infertility. Case description: A 34 year-old female presented with amenorrhoea and infertility. MRI showed a third ventricular mass and hydrocephalus. The amenorrhoea resolved within weeks of endoscopic third ventriculostomy and tumour biopsy; pregnancy ensued within 6 months. Thirty-two cases of hydrocephalus-related amenorrhoea were reported between 1915 and 2007. All patients who underwent modern hydrocephalus treatment experienced partial or complete resolution of endocrine dysfunction. Successful pregnancy was reported in three patients, as in our case presentation. While mechanisms of dysfunction have not been completely elucidated, studies point toward loss of GnRH pulsatility due to compression of the medio-basal hypothalamic structures. Conclusion: Hydrocephalus can cause endocrine dysfunction, including amenorrhoea, which may reverse with CSF diversion. Therefore, cranial imaging is an important component in the evaluation of such endocrine abnormalities.

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