Description
An 84-year-old woman presented to the emergency department with a 3-day history of progressive binocular diplopia on right-sided horizontal gaze, accompanied with gradual-onset right-sided periorbital headache, vomiting and diarrhoea. Medical history consisted of hypertension and chronic kidney disease, stage 2.
Clinical examination demonstrated right-sided VI cranial nerve palsy, normal pupillary light reaction, visual acuity and fields. No other neurological deficits elicited. No clinical features of hypercortisolism, growth hormone excess or adrenal insufficiency were displayed.
Initial blood tests revealed an acute-on-chronic kidney injury (AKI). Admission estimated glomerular filtration rate was 42 mL/min, baseline 74; admission creatinine 180 μmol/L, baseline 142. An urgent CT head, non-contrast in view of the AKI, was performed. Intravenous fluids were administered. CT revealed a 39x18x14 mm sellar mass, involving the pituitary fossa, extending into the left and right cavernous sinus, sphenoid sinus and posterior sella turcica.
On the next day, MRI of the pituitary (figure...
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