> She probably made it up. [...] In this case the woman wanted to get free treatment from NHS. Or maybe this whole story is made up.
Per the article, that is a pretty unlikely explanation, given the vacation and her entitlement to free treatment regardless or the psychiatric eval.
The more likely explanations are either that the story is made up by the doctor, in whole or in part; or the 3rd explanation of the article, that prior knowledge for the woman, along with the tumor itself and different kinds of unpleasant sensations, led to the psychiatric symptoms focusing on the idea of a brain tumor.
EDIT:
> Similar thing is going on with resignation syndrome in Sweden, where refugee children are pretending to be be in coma/sleeping because this prevents Sweden to send them out of the country.
Reading a bit about this, it seems that the Swedish health authorities who actually investigated these children believe that this is a real condition (whether a novel condition or some form of psychosis or depression), so I'm not sure why you are so confident in asserting that it is an obvious ploy.