A phrase that means you want someone in your care to get ill

There is a phrase which can be used to describe someone who is looking after someone but has sinister motives they want them to get unwell or more unwell than they already are, because they want attention from other people at the expense of their ward.

Example:

It's terrible what they found out about Jack, a typical example of ......... can you believe he wanted Sally to get more ill all the while he was meant to be looking after her?

I'm certain it exists, I just can't quite place it.

Solution 1:

This syndrome is called Munchausen by Proxy (as mentioned by ab2 in the comments).

Its name is derived from the Munchausen syndrome where a patient feigns or exaggerates having diseases him/herself; Munchausen refers to the literature character Baron Munchausen, who was based on a real-life baron who exaggerated a lot of stories about his military time.

The 'by proxy' part indicates the person having the disorder is using the person in their care as a 'substitute' instead, for feigning (or actually inflicting) the disease.