My son Mason, now 15, developed a plugged saliva gland, which then got infected. The dentist referred him to an oral surgeon, saying that it's plugged by a stone and the stone will need to be removed. He also says it's likely to happen again. He thinks that "saliva stones" may be related to kidney stones. Has anyone heard of that before? Is someone with a kidney stone condition more likely to have "saliva stones"?