title: A Case of Biopsy-proven Early-onset Alzheimer's Disease with Hemiparkinsonism.
abstract: Patients with dementia and concomitant parkinsonism are frequently encountered in the elderly population. When it comes to young adults, however, coexistence of Alzheimer's disease (AD) and Parkinson's disease (PD) is rare. We described a case of 47-year old man with presenile onset dementia associated with hemiparkinsonism involving the right extremities. Brain biopsy showed neurofibrillary tangles and neuritic plaques, compatible with Alzheimer's disease. Iodine-123 labelled N-(3-iodopropen-2-yl)-2beta-carbomethoxy-3beta-(4-chlorophenyl) tropane ([(123)I]IPT) SPECT, dopamine transporter imaging, revealed a decreased uptake in both basal ganglia, more severe on the left side, particularly the caudal putamen, which is consistent with the finding of idiopathic Parkinson's disease. This case is unique in that damage on the nigrostriatal dopaminergic system in a patient with Alzheimer's disease was demonstrated by a functional neuroimaging study and that early-onset AD and early-onset PD, two rare conditions, coexist in the same individual.
authors.affiliation: Department of Neurology, Korea University College of Medicine, Guro Hospital, Seoul, Korea.
authors.forename: Eun Jung
authors.initials: EJ
authors.lastname: Choi
authors.forename: Hyun
authors.initials: H
authors.lastname: Bang
authors.forename: Joo Hyuk
authors.initials: JH
authors.lastname: Im
authors.forename: Sun Joo
authors.initials: SJ
authors.lastname: Chung
authors.forename: Jae-Hong
authors.initials: JH
authors.lastname: Lee
references.citation: Ann Neurol. 1997 Mar;41(3):368-74
references.pmid: 9066358
references.citation: Ann Neurol. 1995 Mar;37(3):300-12
references.pmid: 7695230
references.citation: Brain. 1999 Aug;122 ( Pt 8):1449-68
references.pmid: 10430831
references.citation: Arch Neurol. 1989 Jun;46(6):651-7
references.pmid: 2730377
references.citation: Ann Neurol. 1998 Sep;44(3 Suppl 1):S19-31
references.pmid: 9749570
references.citation: Arch Neurol. 1997 Aug;54(8):969-75
references.pmid: 9267971
references.citation: Neurology. 1994 Dec;44(12):2300-7
references.pmid: 7991116