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1. Electrodiagnostic subtyping in Guillain–Barré syndrome patients in the International Guillain–Barré Outcome Study

Author

Arends, S, Drenthen, J, de Koning, L, van den Bergh, P, Hadden, R, Kuwabara, S, Reisin, R, Shahrizaila, N, Ajroud-Driss, S, Antonini, G, Attarian, S, Balducci, C, Bertorini, T, Brannagan, T, Cavaletti, G, Chao, C, Chavada, G, Dillmann, K, Dimachkie, M, Galassi, G, Gutierrez-Gutierrez, G, Harbo, T, Islam, B, Islam, Z, Katzberg, H, Kusunoki, S, Manganelli, F, Miller, J, Pardo, J, Pereon, Y, Rajabally, Y, Sindrup, S, Stettner, M, Uncini, A, Verhamme, C, Vytopil, M, Waheed, W, Jacobs, B, Cornblath, D, Addington, J, Badrising, U, Barroso, F, Bateman, K, Bella, I, Benedetti, L, van den Berg, B, Bhavaraju-Sanka, R, Briani, C, Buermann, J, Busby, M, Butterworth, S, Casasnovas, C, Chen, S, Claeys, K, Conti, E, Cosgrove, J, Dalakas, M, van Damme, P, Dardiotis, E, Davidson, A, Doets, A, van Doorn, P, Echaniz-Laguna, A, Eftimov, F, Faber, K, Fazio, R, Feasby, T, Fehmi, J, Fokke, C, Fujioka, T, Fulgenzi, E, Garssen, M, Gijsbers, C, Gilchrist, J, Gilhuis, J, Goldstein, J, Gorson, K, Goyal, N, Granit, V, Gutmann, L, Hartung, H, Holt, J, Hsieh, S, Htut, M, Hughes, R, Jerico-Pascual, I, Kaida, K, Karafiath, S, Khoshnoodi, M, Kiers, L, Kleiweg, R, Kokubun, N, Kolb, N, van Koningsveld, R, van der Kooi, A, Kramers, H, Kuitwaard, K, Kwan, J, Ladha, S, Lassen, L, Lawson, V, Lehmann, H, Cejas, L, Leonhard, S, Luijten, L, Lunn, M, Manji, H, Marfia, G, Infante, C, Martin-Aguilar, L, Martinez-Hernandez, E, Mataluni, G, Mattiazzi, M, Mcdermott, C, Meekins, G, Mohammad, Q, Monges, S, de la Tassa, G, Nascimbene, C, Nobile-Orazio, E, Nowak, R, Osei-Bonsu, M, Pelouto, F, Pulley, M, Gutierrez, L, Reddel, S, van der Ree, T, Rinaldi, S, Ripellino, P, Roberts, R, Rojas-Marcos, I, Roodbol, J, Rudnicki, S, Sachs, G, Samijn, J, Santoro, L, Schenone, A, Tous, M, Sheikh, K, Silvestri, N, Sundrup, S, Sommer, C, Stein, B, Stino, A, Thomma, R, Twydell, P, Varrato, J, Vermeij, F, Verschuuren, J, Visser, L, Walgaard, C, Wang, Y, Willison, H, Wirtz, P, van Woerkom, M, Zivkovic, S, Arends S., Drenthen J., de Koning L., van den Bergh P., Hadden R. D. M., Kuwabara S., Reisin R. C., Shahrizaila N., Ajroud-Driss S., Antonini G., Attarian S., Balducci C., Bertorini T., Brannagan T. H., Cavaletti G., Chao C. -C., Chavada G., Dillmann K. -U., Dimachkie M. M., Galassi G., Gutierrez-Gutierrez G., Harbo T., Islam B., Islam Z., Katzberg H., Kusunoki S., Manganelli F., Miller J. A. L., Pardo J., Pereon Y., Rajabally Y. A., Sindrup S., Stettner M., Uncini A., Verhamme C., Vytopil M., Waheed W., Jacobs B. C., Cornblath D. R., Addington J. M., Badrising U. A., Barroso F. A., Bateman K., Bella I., Benedetti L., van den Berg B., Bhavaraju-Sanka R., Briani C., Buermann J., Busby M., Butterworth S., Casasnovas C., Chen S., Claeys K., Conti E., Cosgrove J. S., Dalakas M., van Damme P., Dardiotis E., Davidson A., Doets A., van Doorn P., Echaniz-Laguna A., Eftimov F., Faber K. G., Fazio R., Feasby T. E., Fehmi J., Fokke C., Fujioka T., Fulgenzi E., Garssen M. P. J., Gijsbers C. J., Gilchrist J. M., Gilhuis J., Goldstein J. M., Gorson K. C., Goyal N., Granit V., Gutmann L., Hartung H. -P., Holt J. K. L., Hsieh S. -T., Htut M., Hughes R. A. C., Jerico-Pascual I., Kaida K., Karafiath S., Khoshnoodi M. A., Kiers L., Kleiweg R. P., Kokubun N., Kolb N. A., van Koningsveld R., van der Kooi A. J., Kramers H., Kuitwaard K., Kwan J. Y., Ladha S. S., Lassen L. L., Lawson V. H., Lehmann H., Cejas L. L., Leonhard S. E., Luijten L., Lunn M. P. T., Manji H., Marfia G. A., Infante C. M., Martin-Aguilar L., Martinez-Hernandez E., Mataluni G., Mattiazzi M., McDermott C., Meekins G., Mohammad Q. D., Monges S., de la Tassa G. M., Nascimbene C., Nobile-Orazio E., Nowak R. J., Osei-Bonsu M., Pelouto F., Pulley M. T., Gutierrez L. Q., Reddel S. W., van der Ree T., Rinaldi S., Ripellino P., Roberts R. C., Rojas-Marcos I., Roodbol J., Rudnicki S. A., Sachs G. M., Samijn J. P. A., Santoro L., Schenone A., Tous M. J. S., Sheikh K. A., Silvestri N. J., Sundrup S. H., Sommer C., Stein B., Stino A. M., Thomma R. C. M., Twydell P., Varrato J. D., Vermeij F. H., Verschuuren J., Visser L. H., Walgaard C., Wang Y., Willison H. J., Wirtz P. W., van Woerkom M., Zivkovic S. A., Arends, S, Drenthen, J, de Koning, L, van den Bergh, P, Hadden, R, Kuwabara, S, Reisin, R, Shahrizaila, N, Ajroud-Driss, S, Antonini, G, Attarian, S, Balducci, C, Bertorini, T, Brannagan, T, Cavaletti, G, Chao, C, Chavada, G, Dillmann, K, Dimachkie, M, Galassi, G, Gutierrez-Gutierrez, G, Harbo, T, Islam, B, Islam, Z, Katzberg, H, Kusunoki, S, Manganelli, F, Miller, J, Pardo, J, Pereon, Y, Rajabally, Y, Sindrup, S, Stettner, M, Uncini, A, Verhamme, C, Vytopil, M, Waheed, W, Jacobs, B, Cornblath, D, Addington, J, Badrising, U, Barroso, F, Bateman, K, Bella, I, Benedetti, L, van den Berg, B, Bhavaraju-Sanka, R, Briani, C, Buermann, J, Busby, M, Butterworth, S, Casasnovas, C, Chen, S, Claeys, K, Conti, E, Cosgrove, J, Dalakas, M, van Damme, P, Dardiotis, E, Davidson, A, Doets, A, van Doorn, P, Echaniz-Laguna, A, Eftimov, F, Faber, K, Fazio, R, Feasby, T, Fehmi, J, Fokke, C, Fujioka, T, Fulgenzi, E, Garssen, M, Gijsbers, C, Gilchrist, J, Gilhuis, J, Goldstein, J, Gorson, K, Goyal, N, Granit, V, Gutmann, L, Hartung, H, Holt, J, Hsieh, S, Htut, M, Hughes, R, Jerico-Pascual, I, Kaida, K, Karafiath, S, Khoshnoodi, M, Kiers, L, Kleiweg, R, Kokubun, N, Kolb, N, van Koningsveld, R, van der Kooi, A, Kramers, H, Kuitwaard, K, Kwan, J, Ladha, S, Lassen, L, Lawson, V, Lehmann, H, Cejas, L, Leonhard, S, Luijten, L, Lunn, M, Manji, H, Marfia, G, Infante, C, Martin-Aguilar, L, Martinez-Hernandez, E, Mataluni, G, Mattiazzi, M, Mcdermott, C, Meekins, G, Mohammad, Q, Monges, S, de la Tassa, G, Nascimbene, C, Nobile-Orazio, E, Nowak, R, Osei-Bonsu, M, Pelouto, F, Pulley, M, Gutierrez, L, Reddel, S, van der Ree, T, Rinaldi, S, Ripellino, P, Roberts, R, Rojas-Marcos, I, Roodbol, J, Rudnicki, S, Sachs, G, Samijn, J, Santoro, L, Schenone, A, Tous, M, Sheikh, K, Silvestri, N, Sundrup, S, Sommer, C, Stein, B, Stino, A, Thomma, R, Twydell, P, Varrato, J, Vermeij, F, Verschuuren, J, Visser, L, Walgaard, C, Wang, Y, Willison, H, Wirtz, P, van Woerkom, M, Zivkovic, S, Arends S., Drenthen J., de Koning L., van den Bergh P., Hadden R. D. M., Kuwabara S., Reisin R. C., Shahrizaila N., Ajroud-Driss S., Antonini G., Attarian S., Balducci C., Bertorini T., Brannagan T. H., Cavaletti G., Chao C. -C., Chavada G., Dillmann K. -U., Dimachkie M. M., Galassi G., Gutierrez-Gutierrez G., Harbo T., Islam B., Islam Z., Katzberg H., Kusunoki S., Manganelli F., Miller J. A. L., Pardo J., Pereon Y., Rajabally Y. A., Sindrup S., Stettner M., Uncini A., Verhamme C., Vytopil M., Waheed W., Jacobs B. C., Cornblath D. R., Addington J. M., Badrising U. A., Barroso F. A., Bateman K., Bella I., Benedetti L., van den Berg B., Bhavaraju-Sanka R., Briani C., Buermann J., Busby M., Butterworth S., Casasnovas C., Chen S., Claeys K., Conti E., Cosgrove J. S., Dalakas M., van Damme P., Dardiotis E., Davidson A., Doets A., van Doorn P., Echaniz-Laguna A., Eftimov F., Faber K. G., Fazio R., Feasby T. E., Fehmi J., Fokke C., Fujioka T., Fulgenzi E., Garssen M. P. J., Gijsbers C. J., Gilchrist J. M., Gilhuis J., Goldstein J. M., Gorson K. C., Goyal N., Granit V., Gutmann L., Hartung H. -P., Holt J. K. L., Hsieh S. -T., Htut M., Hughes R. A. C., Jerico-Pascual I., Kaida K., Karafiath S., Khoshnoodi M. A., Kiers L., Kleiweg R. P., Kokubun N., Kolb N. A., van Koningsveld R., van der Kooi A. J., Kramers H., Kuitwaard K., Kwan J. Y., Ladha S. S., Lassen L. L., Lawson V. H., Lehmann H., Cejas L. L., Leonhard S. E., Luijten L., Lunn M. P. T., Manji H., Marfia G. A., Infante C. M., Martin-Aguilar L., Martinez-Hernandez E., Mataluni G., Mattiazzi M., McDermott C., Meekins G., Mohammad Q. D., Monges S., de la Tassa G. M., Nascimbene C., Nobile-Orazio E., Nowak R. J., Osei-Bonsu M., Pelouto F., Pulley M. T., Gutierrez L. Q., Reddel S. W., van der Ree T., Rinaldi S., Ripellino P., Roberts R. C., Rojas-Marcos I., Roodbol J., Rudnicki S. A., Sachs G. M., Samijn J. P. A., Santoro L., Schenone A., Tous M. J. S., Sheikh K. A., Silvestri N. J., Sundrup S. H., Sommer C., Stein B., Stino A. M., Thomma R. C. M., Twydell P., Varrato J. D., Vermeij F. H., Verschuuren J., Visser L. H., Walgaard C., Wang Y., Willison H. J., Wirtz P. W., van Woerkom M., and Zivkovic S. A.

Abstract

Background and purpose: Various electrodiagnostic criteria have been developed in Guillain–Barré syndrome (GBS). Their performance in a broad representation of GBS patients has not been evaluated. Motor conduction data from the International GBS Outcome Study (IGOS) cohort were used to compare two widely used criterion sets and relate these to diagnostic amyotrophic lateral sclerosis criteria. Methods: From the first 1500 patients in IGOS, nerve conduction studies from 1137 (75.8%) were available for the current study. These patients were classified according to nerve conduction studies criteria proposed by Hadden and Rajabally. Results: Of the 1137 studies, 68.3% (N = 777) were classified identically according to criteria by Hadden and Rajabally: 111 (9.8%) axonal, 366 (32.2%) demyelinating, 195 (17.2%) equivocal, 35 (3.1%) inexcitable and 70 (6.2%) normal. Thus, 360 studies (31.7%) were classified differently. The areas of differences were as follows: 155 studies (13.6%) classified as demyelinating by Hadden and axonal by Rajabally; 122 studies (10.7%) classified as demyelinating by Hadden and equivocal by Rajabally; and 75 studies (6.6%) classified as equivocal by Hadden and axonal by Rajabally. Due to more strictly defined cutoffs fewer patients fulfilled demyelinating criteria by Rajabally than by Hadden, making more patients eligible for axonal or equivocal classification by Rajabally. In 234 (68.6%) axonal studies by Rajabally the revised El Escorial (amyotrophic lateral sclerosis) criteria were fulfilled; in axonal cases by Hadden this was 1.8%. Conclusions and discussion: This study shows that electrodiagnosis in GBS is dependent on the criterion set utilized, both of which are based on expert opinion. Reappraisal of electrodiagnostic subtyping in GBS is warranted.

Published
2024

6. CSF Findings in Relation to Clinical Characteristics, Subtype, and Disease Course in Patients With Guillain-Barré Syndrome

Author

Al-Hakem, H, Doets, A, Stino, A, Zivkovic, S, Andersen, H, Willison, H, Cornblath, D, Gorson, K, Islam, Z, Mohammad, Q, Sindrup, S, Kusunoki, S, Davidson, A, Casasnovas, C, Bateman, K, Miller, J, Van Den Berg, B, Verboon, C, Roodbol, J, Leonhard, S, Arends, S, Luijten, L, Benedetti, L, Kuwabara, S, Van Den Bergh, P, Monges, S, Marfia, G, Shahrizaila, N, Galassi, G, Pereon, Y, Burmann, J, Kuitwaard, K, Kleyweg, R, Marchesoni, C, Tous, M, Querol, L, Martin-Aguilar, L, Wang, Y, Nobile-Orazio, E, Rinaldi, S, Schenone, A, Pardo, J, Vermeij, F, Waheed, W, Lehmann, H, Granit, V, Stein, B, Cavaletti, G, Gutierrez-Gutierrez, G, Barroso, F, Visser, L, Katzberg, H, Dardiotis, E, Attarian, S, Van Der Kooi, A, Eftimov, F, Wirtz, P, Samijn, J, Jacobus Gilhuis, H, Hadden, R, Holt, J, Sheikh, K, Kolb, N, Karafiath, S, Vytopil, M, Antonini, G, Feasby, T, Faber, C, Kramers, H, Busby, M, Roberts, R, Silvestri, N, Fazio, R, Van Dijk, G, Garssen, M, Verschuuren, J, Harbo, T, Jacobs, B, Al-Hakem H., Doets A. Y., Stino A. M., Zivkovic S. A., Andersen H., Willison H. J., Cornblath D. R., Gorson K. C., Islam Z., Mohammad Q. D., Sindrup So. H., Kusunoki S., Davidson A., Casasnovas C., Bateman K., Miller J. A. L., Van Den Berg B., Verboon C., Roodbol J., Leonhard S. E., Arends S., Luijten L. W. G., Benedetti L., Kuwabara S., Van Den Bergh P., Monges S., Marfia G. A., Shahrizaila N., Galassi G., Pereon Y., Burmann J., Kuitwaard K., Kleyweg R. P., Marchesoni C., Tous M. J. S., Querol L., Martin-Aguilar L., Wang Y., Nobile-Orazio E., Rinaldi S., Schenone A., Pardo J., Vermeij F. H., Waheed W., Lehmann H. C., Granit V., Stein B., Cavaletti G., Gutierrez-Gutierrez G., Barroso F. A., Visser L. H., Katzberg H. D., Dardiotis E., Attarian S., Van Der Kooi A. J., Eftimov F., Wirtz P. W., Samijn J. P. A., Jacobus Gilhuis H., Hadden R. D. M., Holt J. K. L., Sheikh K. A., Kolb N., Karafiath S., Vytopil M., Antonini G., Feasby T. E., Faber C., Kramers H., Busby M., Roberts R. C., Silvestri N. J., Fazio R., Van Dijk G. W., Garssen M. P. J., Verschuuren J., Harbo T., Jacobs B. C., Al-Hakem, H, Doets, A, Stino, A, Zivkovic, S, Andersen, H, Willison, H, Cornblath, D, Gorson, K, Islam, Z, Mohammad, Q, Sindrup, S, Kusunoki, S, Davidson, A, Casasnovas, C, Bateman, K, Miller, J, Van Den Berg, B, Verboon, C, Roodbol, J, Leonhard, S, Arends, S, Luijten, L, Benedetti, L, Kuwabara, S, Van Den Bergh, P, Monges, S, Marfia, G, Shahrizaila, N, Galassi, G, Pereon, Y, Burmann, J, Kuitwaard, K, Kleyweg, R, Marchesoni, C, Tous, M, Querol, L, Martin-Aguilar, L, Wang, Y, Nobile-Orazio, E, Rinaldi, S, Schenone, A, Pardo, J, Vermeij, F, Waheed, W, Lehmann, H, Granit, V, Stein, B, Cavaletti, G, Gutierrez-Gutierrez, G, Barroso, F, Visser, L, Katzberg, H, Dardiotis, E, Attarian, S, Van Der Kooi, A, Eftimov, F, Wirtz, P, Samijn, J, Jacobus Gilhuis, H, Hadden, R, Holt, J, Sheikh, K, Kolb, N, Karafiath, S, Vytopil, M, Antonini, G, Feasby, T, Faber, C, Kramers, H, Busby, M, Roberts, R, Silvestri, N, Fazio, R, Van Dijk, G, Garssen, M, Verschuuren, J, Harbo, T, Jacobs, B, Al-Hakem H., Doets A. Y., Stino A. M., Zivkovic S. A., Andersen H., Willison H. J., Cornblath D. R., Gorson K. C., Islam Z., Mohammad Q. D., Sindrup So. H., Kusunoki S., Davidson A., Casasnovas C., Bateman K., Miller J. A. L., Van Den Berg B., Verboon C., Roodbol J., Leonhard S. E., Arends S., Luijten L. W. G., Benedetti L., Kuwabara S., Van Den Bergh P., Monges S., Marfia G. A., Shahrizaila N., Galassi G., Pereon Y., Burmann J., Kuitwaard K., Kleyweg R. P., Marchesoni C., Tous M. J. S., Querol L., Martin-Aguilar L., Wang Y., Nobile-Orazio E., Rinaldi S., Schenone A., Pardo J., Vermeij F. H., Waheed W., Lehmann H. C., Granit V., Stein B., Cavaletti G., Gutierrez-Gutierrez G., Barroso F. A., Visser L. H., Katzberg H. D., Dardiotis E., Attarian S., Van Der Kooi A. J., Eftimov F., Wirtz P. W., Samijn J. P. A., Jacobus Gilhuis H., Hadden R. D. M., Holt J. K. L., Sheikh K. A., Kolb N., Karafiath S., Vytopil M., Antonini G., Feasby T. E., Faber C., Kramers H., Busby M., Roberts R. C., Silvestri N. J., Fazio R., Van Dijk G. W., Garssen M. P. J., Verschuuren J., Harbo T., and Jacobs B. C.

Abstract

Background and ObjectivesTo investigate CSF findings in relation to clinical and electrodiagnostic subtypes, severity, and outcome of Guillain-Barré syndrome (GBS) based on 1,500 patients in the International GBS Outcome Study.MethodsAlbuminocytologic dissociation (ACD) was defined as an increased protein level (>0.45 g/L) in the absence of elevated white cell count (<50 cells/L). We excluded 124 (8%) patients because of other diagnoses, protocol violation, or insufficient data. The CSF was examined in 1,231 patients (89%).ResultsIn 846 (70%) patients, CSF examination showed ACD, which increased with time from weakness onset: ≤4 days 57%, >4 days 84%. High CSF protein levels were associated with a demyelinating subtype, proximal or global muscle weakness, and a reduced likelihood of being able to run at week 2 (odds ratio [OR] 0.42, 95% CI 0.25-0.70; p = 0.001) and week 4 (OR 0.44, 95% CI 0.27-0.72; p = 0.001). Patients with the Miller Fisher syndrome, distal predominant weakness, and normal or equivocal nerve conduction studies were more likely to have lower CSF protein levels. CSF cell count was <5 cells/L in 1,005 patients (83%), 5-49 cells/L in 200 patients (16%), and ≥50 cells/L in 13 patients (1%).DiscussionACD is a common finding in GBS, but normal protein levels do not exclude this diagnosis. High CSF protein level is associated with an early severe disease course and a demyelinating subtype. Elevated CSF cell count, rarely ≥50 cells/L, is compatible with GBS after a thorough exclusion of alternative diagnoses.Classification of EvidenceThis study provides Class IV evidence that CSF ACD (defined by the Brighton Collaboration) is common in patients with GBS.

Published
2023

7. High prevalence of paraspinal muscle involvement in adults with McArdle disease

Author

Alvarez-Velasco, R, Nunez-Peralta, CA, Alonso-Perez, J, Gallardo, E, Collet-Vidiella, R, Reyes-Leiva, D, Pascual-Goni, E, Martin-Aguilar, L, Caballero-Avila, M, Carbayo-Viejo, A, Llauger-Rosello, J, Diaz-Manera, J, and Olive, M

Subjects
McArdle disease, glycogen storage disease, axial myopathy, magnetic resonance imaging, paraspinal muscles, glycogen storage disease type V
Abstract

Introduction/Aims Very few studies analyzing the pattern of muscle involvement in magnetic resonance imaging (MRI) of patients with McArdle disease have been reported to date. We aimed to examine the pattern of muscle fat replacement in patients with McArdle disease. Methods We performed a retrospective study including all patients with genetically confirmed McArdle disease followed in our center from January 2010 to March 2021. Clinical data were collected from the medical record. Whole-body MRI was performed as part of the diagnostic evaluation. The distribution of muscle fat replacement and its severity were analyzed. Results Nine patients were included. Median age at onset was 7 y (range, 5-58) and median age at the time when MRI was performed was 57.3 y (range, 37.2-72.8). At physical examination, four patients had permanent weakness: in three the weakness was limited to paraspinal muscles, whereas in one the weakness involved the paraspinal and proximal upper limb muscles. Muscle MRI showed abnormalities in six of the seven studied patients. In all of them, fat replacement of paravertebral muscles was found. Other muscles frequently affected were the tongue in three, subscapularis in three, and long head of biceps femoris and semimembranosus in two. Discussion Our findings suggest that paraspinal muscle involvement is common in McArdle disease and support the need to include this disease in the differential diagnosis of the causes of paraspinal muscle weakness. Involvement of the tongue and subscapularis are also frequent in McArdle disease.

Published
2022

8. Autoimmune nodopathies, an emerging diagnostic category

Author

Martin-Aguilar, L, Lleixa, C, and Pascual-Goni, E

Subjects
contactin-associated protein 1, neurofascin-155, pan-neurofascin, autoimmune nodopathies, contactin-1
Abstract

Purpose of review In the last decade, antibodies targeting cell adhesion molecules of the node of Ranvier were described in patients with autoimmune neuropathies. These nodal/paranodal antibodies associate with specific clinicopathological features that are different from classical chronic inflammatory demyelinating polyneuropathy (CIDP). In this review, we will summarize recent findings establishing autoimmune nodopathies (AN) as a new category of autoimmune neuropathies. Recent findings AN include anti-contactin 1, anti-contactin-associated protein 1, anti-neurofascin 155 and anti-panneurofascin antibody-mediated neuropathies. Their clinical spectrum includes acute, subacute or chronic onset sensory-motor neuropathies mimicking Guillain-Barre syndrome (GBS) and CIDP, although they differ in their response to standard therapy with intravenous immunoglobulin (IVIG). Neurophysiologically they overlap with acquired demyelinating neuropathies, but ultrastructural studies and animal models demonstrated antibody-mediated pathology restricted to the node of Ranvier. Anti-contactin1 and anti-panneurofascin also associate with nephrotic syndrome. Nodal/paranodal antibodies are predominantly of the immunoglobulin (IgG)4 subclass during the chronic phase of the disease, but complement-fixing IgG3 antibodies are detected during the early phase and associate with aggressive onset and IVIG response. Nodal/paranodal antibodies testing is key in the diagnosis of AN. Summary AN have emerged as a new diagnostic category pathologically different from acquired demyelinating neuropathies. Clinically they overlap with GBS and CIDP although they associate with specific clinical features that should lead to clinical suspicion. Nodal/paranodal antibodies are key effector mechanisms of disease and good diagnostic and disease-monitoring biomarkers in AN.

Published
2022

9. Lesiones cerebrales captantes de gadolinio en el brote de los pacientes con esclerosis múltiple

Author

Martin-Aguilar, L, Presas-Rodriguez, S, Rovira, A, Capellades, J, Massuet-Vilamajo, A, Ramio-Torrenta, L, Tintore, M, Brieva-Ruiz, L, Moral, E, Cano-Orgaz, A, Blanco, Y, Batlle-Nadal, J, Carmona, O, Gea, M, Hervas-Garcia, JV, Ramo-Tello, C, Institut Català de la Salut, [Martín-Aguilar L] Neurology Department, Hospital de la Santa Creu i Sant Pau, Barcelona, Spain. [Presas-Rodriguez S] Multiple Sclerosis Unit, Hospital Universitari Germans Trias i Pujol, Badalona, Barcelona, Spain. [Rovira À] Secció de Neuroradiologia, Vall d’Hebron Hospital Universitari, Barcelona, Spain. [Capellades J] Neuroradiology Department, Hospital del Mar, Barcelona, Spain. [Massuet-Vilamajó A] Neuroradiology Section, Diagnostic Imaging Institute, Hospital Germans Trias i Pujol, Badalona, Barcelona, Spain. [Ramió-Torrentà L] Multiple Sclerosis Unit, Hospital Universitari de Girona Doctor Josep Trueta, Girona, Spain. [Tintoré M] Servei de Neurologia, Vall d’Hebron Hospital Universitari, Barcelona, Spain, and Vall d'Hebron Barcelona Hospital Campus

Subjects
Brote, Multiple Sclerosis, Otros calificadores::Otros calificadores::/farmacoterapia [Otros calificadores], Gadolinium, Gadolinium enhancement, Other subheadings::Other subheadings::/drug therapy [Other subheadings], Nervous System::Central Nervous System::Brain [ANATOMY], sistema nervioso::sistema nervioso central::encéfalo [ANATOMÍA], Methylprednisolone, Lesiones captantes de gadolinio, Cervell - Imatgeria per ressonància magnètica, Recurrence, Resonancia magnética, Materials Chemistry, Humans, Relapse, Other subheadings::Other subheadings::/diagnostic imaging [Other subheadings], Nervous System Diseases::Autoimmune Diseases of the Nervous System::Demyelinating Autoimmune Diseases, CNS::Multiple Sclerosis [DISEASES], Brain, Otros calificadores::Otros calificadores::/diagnóstico por imagen [Otros calificadores], Magnetic Resonance Imaging, Esclerosis múltiple, enfermedades del sistema nervioso::enfermedades autoinmunitarias del sistema nervioso::enfermedades autoinmunes desmielinizantes del SNC::esclerosis múltiple [ENFERMEDADES], Neurology (clinical), Esclerosi múltiple - Tractament, MRI
Abstract

Esclerosis múltiple; Brote; Resonancia magnética Esclerosi múltiple; Brot; Imatge per ressonància magnètica Multiple sclerosis; Outbreak; Magnetic resonance imaging Objective To study the clinico-radiological paradox in multiple sclerosis (MS) relapse by analyzing the number and location of gadolinium-enhanced (Gd+) lesions on brain MRI before methylprednisolone (MP) treatment. Methods We analyzed brain MRI from 90 relapsed MS patients in two Phase IV multicenter double-blind randomized clinical trials that showed the noninferiority of different routes and doses of MP administration. A 1.5- or 3-T brain MRI was performed at baseline before MP treatment and within 15 days of symptom onset. The number and location of Gd+ lesions were analyzed. Associations were studied using univariate analysis. Results Sixty-two percent of patients had at least 1 Gd+ brain lesion; the median number was 1 (interquartile range 0–4), and 41% of patients had 2 or more lesions. The most frequent location of Gd+ lesions was subcortical (41.4%). Gd+ brain lesions were found in 71.4% of patients with brainstem-cerebellum symptoms, 57.1% with spinal cord symptoms and 55.5% with optic neuritis (ON). Thirty percent of patients with brain symptoms did not have Gd+ lesions, and only 43.6% of patients had symptomatic Gd+ lesions. The univariate analysis showed a negative correlation between age and the number of Gd+ lesions (p = 0.002). Conclusion Most patients with relapse showed several Gd+ lesions on brain MRI, even when the clinical manifestation was outside of the brain. Our findings illustrate the clinico-radiological paradox in MS relapse and support the value of brain MRI in this scenario. Objetivo Estudiar la paradoja clínico-radiológica en el brote de la esclerosis múltiple (EM) mediante el análisis de lesiones captantes de gadolinio (Gd+) en la RM cerebral antes del tratamiento con metilprednisolona (MP). Métodos Analizamos la RM cerebral basal de 90 pacientes con EM en brote de 2 ensayos clínicos aleatorizados multicéntricos fase IV que demostraron la no inferioridad de diferentes vías y dosis de MP, realizadas antes del tratamiento con MP y en los 15 días siguientes a la aparición de los síntomas. Se analizaron el número y la localización de las lesiones Gd+. Se estudiaron las asociaciones mediante análisis univariado. Resultados El 62% de los pacientes tenía al menos una lesión Gd+ cerebral y el 41% de los pacientes tenía 2 o más lesiones. La localización más frecuente fue la subcortical (41,4%). Se encontraron lesiones Gd+ cerebrales en el 71,4% de los pacientes con síntomas de tronco cerebral o cerebelo, en el 57,1% con síntomas medulares y en el 55,5% con neuritis óptica. El 30% de los pacientes con síntomas cerebrales no tenían lesiones Gd+ y sólo el 4,.6% de los pacientes tenían lesiones Gd+ sintomáticas. El análisis univariante mostró una correlación negativa entre la edad y el número de lesiones Gd+ (p = 0,002). Conclusiones La mayoría de los pacientes en brote mostraron varias lesiones Gd+ en la RM cerebral, incluso cuando la manifestación clínica fue medular u óptica. Nuestros hallazgos ilustran la paradoja clínico-radiológica en el brote de la EM y apoyan el valor de la RM cerebral en este escenario. This work was supported in part by the Ministry of Health of Spain (grant numbers EC07/90278 and EC11/132) and personal grant Rio Hortega CM19/00042 to LMA.

Published
2022

12. Neurofascin-155 CIDP patients: Clinical, immunological and biomarker features

Author

Martin-Aguilar, L, Lleixa, C, Pascual-Goni, E, Caballero, M, Martinez-Martinez, L, Diaz-Manera, J, Rojas, R, Cortes-Vicente, E, de Luna, N, Suarez-Calvet, X, Gallardo, E, Rajabally, Y, Scotton, S, Jacobs, B, Baars, A, Cortese, A, Vegezzi, E, Hoftberger, R, Zimprich, F, Roesler, C, Nobile-Orazio, E, Liberatore, G, Liong, HF, Martinez-Pineiro, A, Carvajal, A, Pinar-Morales, R, Uson-Martin, M, Alberti, O, Lopez-Perez, MA, Marquez, F, Pardo-Fernandez, J, Cabrera-Serrano, M, Munoz-Delgado, L, Ortiz, N, Duman, O, Bartolome, M, Bril, V, Segura-Chavez, D, Pitarokoili, K, Steen, C, Illa, I, and Querol, L

Subjects
neurofascin-155 (NF155), neurofilament light chain (NfL), Chronic inflammatory demyelinating polyradiculoneuropathy (CIDP), NF155 antibody titers
Published
2021

13. Clinical characteristics of patients with stroke code activation not identified by the emergency medical service

Author

Gea, M, Alvarez, M, Forcen, S, Pare, M, Sorrentino, A, Zhu, N, Planas-Ballve, A, Broto, J, Martin-Aguilar, L, Ramos-Pachon, A, Hernandez-Perez, M, Dorado, L, Gomis, M, Milian, M, Davalos, A, and de la Ossa, NP

Subjects
Medical emergency system, Stroke identification, Acute stroke, Stroke code, Prehospital
Abstract

Aims. To determine the sensitivity of stroke detection by emergency medical services (EMS) and to analyse the clinical characteristics of unidentified patients with suspected stroke. Patients and methods. Prospective register of patients with suspected stroke in our area (850,000 inhabitants) from 2011 to 2017. The population that notified the EMS was selected. Of this population, patients with and without stroke code activation by the EMS were compared (EMS+ versus EMS-). Demographics, time to progression, clinical characteristics of the episode and reperfusion therapy administered were recorded. Results. Of a total of 5,497 patients with suspected stroke, 2,087 alerted the EMS: 1,611 (77%) EMS+ and 476 (33%) EMS-. The EMS- patients presented lower scores on the National Institute of Health Stroke Scale (8 vs. 11) and a greater frequency of clinical features of the vertebrobasilar territory (14.1% vs. 8.7%) and partial hemispheric clinical features (23.5% vs. 18.4%), especially in the left hemisphere (78.1% vs. 48.4%). Reperfusion treatment was administered in 29% of EMS+ and 23% of EMS-. The time from symptom onset to treatment was 42 minutes longer in the EMS group (175 versus 133 minutes). Conclusions. The sensitivity of EMS to detect stroke patients in our series is 77%. We have identified clinical features associated with lack of sensitivity, such as vertebrobasilar territory symptoms or isolated language disorder.

Published
2020

14. Autoantibodies in chronic inflammatory demyelinating polyradiculoneuropathy

Author

Pascual-Goni, E, Martin-Aguilar, L, and Querol, L

Subjects
nodal neurofascin, chronic inflammatory demyelinating polyradiculoneuropathy, contactin-associated protein 1, neurofascin-155, contactin-1
Abstract

Purpose of review Chronic inflammatory demyelinating polyradiculoneuropathy (CIDP) is a heterogeneous disorder that includes diverse clinical presentations and immunopathological mechanisms. Antibodies targeting proteins of the node of Ranvier are present in a subset of CIDP patients. These autoantibodies are pathogenic and associate with specific clinical phenotypes and therapeutic peculiarities. This review summarizes the novel insights that the discovery of novel autoantibodies has brought to the understanding of CIDP. Recent findings Several reports have confirmed the association of the antineurofascin 155 (NF155) antibodies with tremor, ataxia and poor response to IVIG, and with novel pathological features in CIDP patients. The association of nephrotic syndrome with anticontactin 1 (CNTN1) and antinodal neurofascin antibodies has also been described. Also, complement-fixing IgG3 antibodies targeting paranodal proteins have been associated with acute-onset CIDP. Importantly, detection of these autoantibodies has helped selecting CIDP patients for rituximab treatment. Finally, anti-CNTN1 and anti-NF155 antibodies have proven to be the first pathogenic autoantibodies described in CIDP. The discovery of autoantibodies against nodal and paranodal proteins has proven useful in clinical practice, has uncovered novel pathophysiological mechanisms, clinical phenotypes, therapeutic response and prognosis within the CIDP disease spectrum and has boosted the search for other clinically relevant autoantibodies.

Published
2019

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