I have a question on renal problems. In my notes I have written "DSWL: unpassable upper stone." which I'm assuming is a stone in the upper urinary tract (tubules, kidney, etc.) that can't be passed and needs surgical removal. But, what I can't figure out for the life of me is what DSWL stands for? Has anyone heard this term? It's not listed anywhere so I have resorted to here. I have emailed my professor but we all know how they love to get back to us ASAP......... Any help is appreciated!