There are, certainly, similarities between Worster-Drought and congenital bilateral perisylvian syndromes, and it may be that, if not entirely the same, there is a continuum between the two. There does seem to be some confusion in the literature and a better option could be to abandon both these terms and include them under the heading of suprabulbar paresis: congenital and acquired.
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Neil Gordon (2002) studied this question.