What "form of parkinsonism" was your husband described as having?
Does your husband have the central feature and at least two of the core features described on the LBDA website? (
http://lbda.org/content/symptoms)
As you may know, LBD is an umbrella term that refers to two disorders -- Parkinson's Disease Dementia and Dementia with Lewy Bodies. The diagnosis depends on the relative timing of the onset of various symptoms.