What happened to neuropathology in 1946?

The esteemed Dr. Jim Mandell and his son were recently playing with the amazing Google Books Ngram Viewer. Google Ngram searches a huge corpus of books for the mention of a particular search term. It then graphs the frequency with which that term appears over time. On a whim, the Mandell's entered the search term "neuropathologist". Here's the resulting graph:I couldn't fit the y-axis label in the picture, but it ranges from 0% up to 0.00000300%. Dr. Mandell challenges his neuropathology colleagues to explain the sharp spike in the usage of "neuropathologist" around 1946-47. Please enter your speculations in the comment section. Dr. Mandell also points out the lamentable fact that it "appears we are past our peak".
Source: neuropathology blog - Category: Pathologists Tags: facts and figures history Source Type: blogs