Asymptomatic idiopathic intracranial hypertension post female to male gender transition.

A 23- year-man post female to male (FTM) gender transition was found to have bilateral papilloedema at a routine optician visit. The patient was referred on for formal ophthalmological and neurological assessments. Optical coherence tomography (OCT) confirmed the presence of bilateral papilloedema. The patient was entirely asymptomatic and had no medical history. He took testosterone intramuscularly once per month. Neurological examination was otherwise normal. Investigations including routine blood panels, CT brain, MRI brain and cerebral MR venogram were all normal. Lumbar puncture yielded cerebrospinal fluid (CSF) normal in appearance but demonstrated raised intracranial pressure. In the absence of other causative aetiologies a diagnosis of idiopathic intracranial hypertension (IIH) was made. Treatment was commenced with acetazolamide and the patient was discharged with outpatient ophthalmological and neurological follow-up. © BMJ Publishing Group Limited 2021. No commercial re-use. See rights and permissions. Published by BMJ.