
NHS Western Isles says a patient was sent a fraudulent email asking them to send photographs and videos of themself following a breast screening appointment.
The health board said the sender claimed to be a health professional and was requesting the images for assessment.
NHS Western Isles said it took patient confidentiality and information security "extremely seriously".
A spokesperson said the health board was reviewing the incident and urged other patients to be alert to similar emails.
NHS Western Isles said the email originated from a non-NHS email address.
The spokesperson said: "NHS Western Isles would like to reassure the public that breast screening services do not contact patients using personal or non-NHS email addresses.
"Patients may be contacted by letter or telephone regarding breast screening appointments, results, or follow-up arrangements, but NHS staff would never ask patients to send photographs or videos by email."
They added: "If you believe you have shared personal information or images in response to a scam, you should contact Police Scotland on 101 and seek appropriate support and advice."