Differentiation of Parkinson's disease and multiple system atrophy in early disease stages by means of I-123-MIBG-SPECT. Export

@article{citeulike:1655285, abstract = {BACKGROUND: Differential diagnosis between idiopathic Parkinson's disease (PD) and multiple system atrophy (MSA) is often difficult in early disease stages. Since MSA is misdiagnosed as PD in more than 20\% of the early stages, there is need for methods refining the differentiation of the two disease entities. In PD postganglionic involvement of the autonomic nervous system (ANS) predominates whereas in MSA the ANS is mainly affected in its preganglionic structures. The functional integrity of postganglionic cardiac sympathetic neurons can be investigated using I-123-metaiodobenzylguanidine-single photon emission computed tomography (MIBG-SPECT). OBJECTIVES: We investigated whether I-123-MIBG-SPECT allows to differentiate between early stages of PD and MSA in patients not yet requiring L-dopa therapy. METHODS: Thirty patients (10 PD and 20 MSA patients) underwent MIBG-SPECT and evaluation of heart rate variability (HRV). Patients on any medication interfering with MIBG-accumulation were excluded from the study. Cardiac perfusion was evaluated by myocardial scintigraphy. RESULTS: The median cardiac MIBG uptake was significantly decreased in PD as well as MSA patients compared to controls (P<0.001). However, in the PD group MIBG uptake was significantly lower than in MSA (P=0.03). Even in PD patients without clinical signs of autonomic failure, MIBG uptake was significantly lower than in MSA patients (P=0.03). Analysis of heart rate parameters did not differentiate between PD and MSA patients. The median coefficient of variation was significantly smaller in PD and MSA patients compared to control subjects. CONCLUSIONS: Our study shows that MIBG-SPECT identifies autonomic cardiac dysfunction in very early stages of both, PD and MSA. More importantly, the technique facilitates differentiation of MSA and PD in the early stages. The different pathology with prominent peripheral, postganglionic sympathetic dysfunction in PD and primarily central and preganglionic lesions in MSA accounts for a lower MIBG uptake in PD compared to MSA patients.}, address = {Department of Neurology, University Erlangen-Nuernberg, Schwabachanlage 6, 91054, Erlangen, Germany.}, author = {Druschky, A. and Hilz, M. J. and Platsch, G. and Radespiel-Tr\"{o}ger, M. and Druschky, K. and Kuwert, T. and Neund\"{o}rfer, B.}, citeulike-article-id = {1655285}, citeulike-linkout-0 = {http://view.ncbi.nlm.nih.gov/pubmed/10785250}, citeulike-linkout-1 = {http://www.hubmed.org/display.cgi?uids=10785250}, day = {1}, issn = {0022-510X}, journal = {J Neurol Sci}, keywords = {diagnosis, msa, pd}, month = {April}, number = {1}, pages = {3--12}, posted-at = {2007-09-14 10:24:50}, priority = {3}, title = {Differentiation of Parkinson's disease and multiple system atrophy in early disease stages by means of I-123-MIBG-SPECT.}, url = {http://view.ncbi.nlm.nih.gov/pubmed/10785250}, volume = {175}, year = {2000} }

TY - JOUR ID - citeulike:1655285 L3 - citeulike-article-id:1655285 N2 - BACKGROUND: Differential diagnosis between idiopathic Parkinson's disease (PD) and multiple system atrophy (MSA) is often difficult in early disease stages. Since MSA is misdiagnosed as PD in more than 20% of the early stages, there is need for methods refining the differentiation of the two disease entities. In PD postganglionic involvement of the autonomic nervous system (ANS) predominates whereas in MSA the ANS is mainly affected in its preganglionic structures. The functional integrity of postganglionic cardiac sympathetic neurons can be investigated using I-123-metaiodobenzylguanidine-single photon emission computed tomography (MIBG-SPECT). OBJECTIVES: We investigated whether I-123-MIBG-SPECT allows to differentiate between early stages of PD and MSA in patients not yet requiring L-dopa therapy. METHODS: Thirty patients (10 PD and 20 MSA patients) underwent MIBG-SPECT and evaluation of heart rate variability (HRV). Patients on any medication interfering with MIBG-accumulation were excluded from the study. Cardiac perfusion was evaluated by myocardial scintigraphy. RESULTS: The median cardiac MIBG uptake was significantly decreased in PD as well as MSA patients compared to controls (P<0.001). However, in the PD group MIBG uptake was significantly lower than in MSA (P=0.03). Even in PD patients without clinical signs of autonomic failure, MIBG uptake was significantly lower than in MSA patients (P=0.03). Analysis of heart rate parameters did not differentiate between PD and MSA patients. The median coefficient of variation was significantly smaller in PD and MSA patients compared to control subjects. CONCLUSIONS: Our study shows that MIBG-SPECT identifies autonomic cardiac dysfunction in very early stages of both, PD and MSA. More importantly, the technique facilitates differentiation of MSA and PD in the early stages. The different pathology with prominent peripheral, postganglionic sympathetic dysfunction in PD and primarily central and preganglionic lesions in MSA accounts for a lower MIBG uptake in PD compared to MSA patients. IS - 1 JF - J Neurol Sci SN - 0022-510X AD - Department of Neurology, University Erlangen-Nuernberg, Schwabachanlage 6, 91054, Erlangen, Germany. EP - 12 TI - Differentiation of Parkinson's disease and multiple system atrophy in early disease stages by means of I-123-MIBG-SPECT. VL - 175 SP - 3 KW - diagnosis KW - msa KW - pd AU - Druschky, A AU - Hilz, MJ AU - Platsch, G AU - Radespiel-Tröger, M AU - Druschky, K AU - Kuwert, T AU - Neundörfer, B PY - 2000/04/01/ UR - http://view.ncbi.nlm.nih.gov/pubmed/10785250 ER -