Of all the lesions involving the brain, none requires more judgment and experience in its successful management than an abscess. That an abscess exists may be difficult of proof. Frequently when its presence seems unquestioned, a precise localization cannot be made. Lastly, when the diagnosis of an abscess in a definite area is reached, the decision as to the proper time and method for its evacuation taxes all the surgeon's skill. All too often diagnosis and localization are proved correct, but the patient dies as the result of imperfectly applied surgical measures.
This report is based on a series of fifty-one verified abscesses of the brain, thirty-nine from the neurosurgical service of the University Hospital, eight from the Graduate Hospital and four from Mount Sinai Hospital. The etiology and pathology of brain abscess have been extensively reviewed by many writers. Further repetition of these points seems unnecessary. I wished to