From the PDF:
You are a patient in an old, rambling hospital. Part of it is shut down, part of it lies in decay. The equipment is out of date, the staff are unmotivated and the whole place reeks of disinfectant, death and seventy years of despair. The hospital has ghosts and spirits walking the halls but they are the least of your worries. You should be afraid of what comes out at night. You should be afraid of what makes the ghosts flee.
Invasive Procedures is the new Fear Itself adventure from Gareth Hanrahan, author of Arkham Detective Tales, three Skulduggery settings and the forthcoming Brief Cases: Three Adventures for Mutant City Blues. Invasive Procedures includes an extract from The Book of Unremitting Horror.
Invasive Procedures now includes conversion information so you can run this adventure with the Trail of Cthulhu system.