Hey,
So unfortunately one of my Northern leopard frogs died all of a sudden. I've been keeping a pair in a 20 gallon long tank for about 3 years now. They had been doing well, the tank was well maintained but all of a sudden one of them expired. I didn't have any warning signs like redness/bloating/lethargy but I did notice that it's abdomen was looking a little weird/bulging the last week or so. When it passed unexpectedly, I did what any herp collector with a medical background would do: I performed an autopsy. On gross exam, the abdomen was a little full but instead of the usual edema I would expect (most deaths are due to infection), I felt a really hard, large mass. When I opened him up, it was a firm, rubbery, nodular mass about 30mm in diameter and it was kidney shaped. I did a little lit search and I came across Lucke's tumor which is a kidney cancer that affects N. leopard frogs caused by a (nonhuman) herpesvirus. I'm no pathologist or vet but the mass looked awfully similar to the images I saw in the papers I looked at. Has anyone else ever encountered this or heard of this? I'll let you know if the tank mate succumbs to this as well. Thanks!