Final answer:
Spoliation refers to the unintentional destruction of evidence, which is what occurred when the information systems department mistakenly deleted a record involved in a medical malpractice case.
Step-by-step explanation:
The unintentional destruction of evidence in this scenario is known as spoliation. Spoliation refers to the loss, destruction, or alteration of evidence relevant to a legal case. In this case, the accidental deletion of the record involved in a medical malpractice case constitutes spoliation as it hinders the ability to obtain the necessary evidence for the case.