Answer
In the Name of Allah, Most Gracious, Most Merciful.
All praise and thanks are due to Allah, and peace and blessings be upon His Messenger.
In this fatwa:
It is permissible for doctors to lie to the patient if this will improve their medical condition and will not have harmful consequences to the patient.
Answering your question, The Permanent Committee for Scholarly Research and Ifta’ in Saudi Arabia, states:
It is permissible to lie to the patient if this will improve their medical condition and will not have harmful consequences to the patient or to others.
But if it is possible for the male or female doctors to use equivocation or ambiguous words, without resorting to direct lying, that would be safer and preferable.
Almighty Allah knows best.
Source: www.alifta.com