I wish to present this short discussion with photomicrographs to make record of two distinctive findings in a case of acute poliomyelitis. One of these in particular is the demonstration of all coats of smaller arteries involved in the inflammatory infiltration, and the other an illustration of a hydrops of an anterior horn cell. The case will be outlined briefly, the salient positive facts being stated, and a discussion of the pathologic points that seem striking made more in detail.
The patient furnishing the material for this study was never seen clinically by me. I was asked by Dr. Frank Hall to participate with Dr. Castle at the autopsy and was given charge of the brain and spinal cord.
The patient was a male, aged 19, who died on the sixth day of the illness. The case was initiated with fever and pains in the back of the neck and