21st February 2025

An 82-year-old woman with a history of squamous cell lung cancer presents with a 5-day history of worsening confusion.

An 82-year-old woman with a history of squamous cell lung cancer presents with a 5-day history of worsening confusion. On examination, her AMTS is 7/10 and she appears dehydrated. Her admission blood tests demonstrate a stage I AKI and an adjusted calcium of 3.2 mmol/L (2.2-2.6 mmol/L).
Which other investigation finding is most likely to be present in this patient?

Select the SINGLE most appropriate option from the list below. Select ONE option only.