Various conditions may cause bone tissue to grow incorrectly. However, when this occurs on the scalp, there can be fatal consequences. This was the case with a woman in the Netherlands whose scalp had swollen to three times the normal size, putting severe pressure on the brain. Doctors at the University Medical Center of Utrecht in the Netherlands made a 3D printed model of a normal sized scalp and replaced her swollen scalp with the new, plastic version. As of press time, the patient was recovering nicely and had returned to work.