title: The clinical overlap between the corticobasal degeneration syndrome and other diseases of the frontotemporal spectrum: three case reports.
abstract: The corticobasal degeneration syndrome has been suggested to be part of a complex of conditions (including the different subtypes of frontotemporal dementia and progressive supranuclear palsy), which reflect a spectrum of pathological substrates. This concept is supported by the frequent clinical overlap that can be observed among patients diagnosed with these conditions. We report three clinical cases, characterized by the overlap of the clinical features of corticobasal degeneration syndrome with, respectively, nonfluent progressive aphasia, progressive supranuclear palsy and semantic dementia. Current diagnostic criteria emphasize differences in clinical presentation, which probably reflect the preferential location of pathology in the early stages of disease. However, with disease progression, a considerable clinical overlap can be expected among the different syndromes. This concept should be extended not only to the cognitive and behavioural features of the frontotemporal dementia subtypes, but also to the movement disorders of corticobasal degeneration and supranuclear palsy.
authors.affiliation: Department of Neurology and Neurorehabilitation, San Raffaele Turro Hospital, Milan, Italy. raggi.alberto@hsr.it
authors.forename: Alberto
authors.initials: A
authors.lastname: Raggi
authors.forename: Alessandra
authors.initials: A
authors.lastname: Marcone
authors.forename: Sandro
authors.initials: S
authors.lastname: Iannaccone
authors.forename: Valeria
authors.initials: V
authors.lastname: Ginex
authors.forename: Daniela
authors.initials: D
authors.lastname: Perani
authors.forename: Stefano F
authors.initials: SF
authors.lastname: Cappa
mesh_terms: D000369:Aged, 80 and over; D001037:Aphasia / Q000175:diagnosis / Q000209:etiology*; D002560:Cerebrovascular Circulation / Q000502:physiology; D003704:Dementia / Q000175:diagnosis / Q000209:etiology* / Q000473:pathology*; D004569:Electroencephalography; D004576:Electromyography; D005260:Female; D005625:Frontal Lobe / Q000098:blood supply / Q000473:pathology*; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D009410:Nerve Degeneration / Q000150:complications* / Q000473:pathology*; D009483:Neuropsychological Tests; D011712:Pyramidal Tracts / Q000098:blood supply / Q000473:pathology*; D012720:Severity of Illness Index; D013494:Supranuclear Palsy, Progressive / Q000175:diagnosis / Q000473:pathology*; D013577:Syndrome; D013702:Temporal Lobe / Q000098:blood supply / Q000473:pathology*