No Jah, it isn't. Deep vein thrombosis is a blood clot that commonly forms in the left leg where as a Cyst is a membrane that contains either air, fluids or semi-solid material. Yes I looked that up and you're by all means welcome to ridicule me for it but in future I suggest that you do the same because not only does it make your reply less confusing but it also enhances the effect of the comedic content you wish to convey in order to get one up on me. I advise that you take my advice because your reply was yet another awful example of a joke falling on it's arse making you look like a bit of a wally.