Can you see it? [edited to give a clue - you are looking for the cat face in the effusion)
A few weeks ago Zigs was extremely poorly and struggling to breathe. An xray showed up plueral effusion. A sample was drawn and tested positive. The diagnosis was not good and he was sent home for his final few days. The vet did what she could to make him comfortable and said she'd be available 24/7 over the weekend if I thought the time was right. Instead he went and did a rather dramatic bounce back.
This is his x-ray. The white cloudiness is the effusion. His lung should show up black. I was given a copy this morning because whatever it is, is turning out to be rather puzzling. His cytology report, xrays and a sample of the effusion was sent away. Several vet specialists have looked at the results. Even an expert pathologist. There is absolutely no doubt he was an extremely sick boy.
Today he went for a checkup. There is no sign of the effusion. No-one knows what it was or what caused it, nor why test results were positive., but he is stable and a very happy purry cat. There possibly may be some other underlying cause, but as it currently stands he is doing fine
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PS If you can see it, then the term is Pareidolia.
Its supposedly a sign of intelligence whereby we are predisposed to seek the familiar.