Advertisement I've been doing some reading on cysts in tarantulas, and I'm not sure if this really follows the pattern. This is Bella, a female B. Smithi. I've had her for just over twelve years without any problems at all. For the past six months or so, she's had a bald patch on her abdomen, but it just looked like your typical run-of-the-mill bald patch. Thing is, she doesn't really kick much - I don't handle her, the only thing that ever goes into the tank is food. But the patch didn't show a lump or anything, it was always smooth and uniform with the rest of her abdomen. But she just molted. Just before the molt, she stopped eating (normal), and as her abdomen shrank, it started to look misshapen, like there was a crater on top of it and a bumpy bulge at the back, right where the bald patch was. She molted successfully and seems to have come through - she cleared the skin about 36 hours ago and looks happy enough. Except for this awful-looking, lumpy, bald, protrusion on her abdomen. It doesn't look like the photos of "cysts" I've seen. And it didn't appear until the molt - two days before the molt, her abdomen was perfectly normal-shaped. Humidity in the tank is usually 75-80% just naturally (I'm on the west coast of Vancouver Island), temperature is 70ish normally. This just kind of came out of nowhere. The photos aren't great (my phone camera sucks), but you can see the lumpy, ugly protrusion. Anyone seen anything like this before? I know she's not a spring chicken, but 12 isn't that old for a B. Smithi. Any help is appreciated.