"Inadvertent damage" refers to harm or injury that is caused unintentionally or accidentally, without any deliberate intent or purpose. Full definition
There is a major risk, associated with the surgical procedure itself, of causing inadvertent damage to the parathyroid glands, which lie close to or within the thyroid glands and are crucial in maintaining stable blood - calcium levels. (chai-online.org)
Inability to do so can result in incomplete removal of the thyroid or inadvertent damage to the parathyroids, which can cause chronically low calcium levels. (sciencedaily.com)
And as tourism has ballooned in recent years, so have inadvertent damage to sensitive walls and dwellings made of stone and mud, and the disappearance of potsherds and other artefacts. (scientificamerican.com)