Since the recognition of epidemic encephalitis as a clinical entity, numerous additions have been made to its bizarre symptomatology. Physicians have been led to believe that almost any neurologic syndrome is possible in this disease. As a result, there is a tendency to attribute obscure neurologic pictures to the disease, without the continuous and careful study that such cases require. It may be difficult at the particular moment to criticize the diagnosis. No one, at the time, has anything better to offer. In not a few instances, unless something specific occurs to bring the diagnosis into question, the case goes on record as encephalitis.
How often such errors are committed it is not possible to say. The tendency to let this disease explain complicated symptoms is well known. Some cases have been followed to their denouement only to show other pathologic changes that accounted for the symptoms.