Biopsy because it is a medical procedure where a small sample of tissue is taken from a suspicious mass for examination and often can lead to revelation of a disease ,so waiting for the test results would be anything but hoped for.
Consider the statement "The whole process of waiting for the test results of the biopsy of a suspicious mass caused a lot of anxiety.". Is the statement "Waiting for the test results of the biopsy of a suspicious mass is something i'd always hoped for..." false? Yes/no/unknown