PMID- 31743253 OWN - NLM STAT- MEDLINE DCOM- 20200520 LR - 20200520 IS - 1537-1611 (Electronic) IS - 1522-0443 (Linking) VI - 21 IP - 2 DP - 2019 Dec TI - A Case of Triple-Negative Myasthenia Gravis Lambert-Eaton Overlap Syndrome With Negative Agrin and LRP-4 Antibodies. PG - 103-106 LID - 10.1097/CND.0000000000000189 [doi] AB - A case of triple-negative myasthenia gravis Lambert-Eaton overlap syndrome with negative Agrin and LRP-4 antibodies. Myasthenia gravis (MG) is an autoimmune disorder that shares similar features with Lambert-Eaton myasthenic syndrome. The combined clinical and electrophysiological findings of MG and Lambert-Eaton myasthenic syndrome have been reported, these cases represent the so-called "myasthenia gravis Lambert-Eaton overlap syndrome" (MLOS). A total of 55 MLOS cases have been identified, 13 cases were reported before the acetylcholine receptor (AChR) antibody (ab) testing era, 14 during the AChR-ab era, 26 during the voltage-gated calcium channel (VGCC)-ab era, and 2 cases have been reported during the muscle-specific kinase (MuSK)-ab era, of these; only 1 patient tested negative for all 3 antibodies. New immunological markers have been identified in the study of MG [Agrin and the low-density lipopro-tein receptor-related protein 4 (LRP-4)]. We present a patient with MLOS who tested negative for all 5 (AChR, MuSK, VGCC, Agrin, and LRP-4) serologic markers. FAU - Maturana, Miguel A AU - Maturana MA AD - Department of Neurology and Clinical Neurophysiology, Methodist University Hospital, University of Tennessee Health Science Center, Memphis, TN. FAU - Bertorini, Tulio E AU - Bertorini TE AD - Department of Neurology and Clinical Neurophysiology, Methodist University Hospital, University of Tennessee Health Science Center, Memphis, TN. FAU - Mei, Lin AU - Mei L AD - Department of Neuroscience and Regenerative Medicine, Medical College of Georgia, Augusta University, Augusta, GA. FAU - Pandhi, Abhi AU - Pandhi A AD - Department of Neurology and Clinical Neurophysiology, Methodist University Hospital, University of Tennessee Health Science Center, Memphis, TN. FAU - Mays, William H AU - Mays WH AD - Department of Neurology and Clinical Neurophysiology, Methodist University Hospital, University of Tennessee Health Science Center, Memphis, TN. LA - eng PT - Case Reports PT - Journal Article PL - United States TA - J Clin Neuromuscul Dis JT - Journal of clinical neuromuscular disease JID - 100887391 RN - 0 (Agrin) RN - 0 (Autoantibodies) RN - 0 (Biomarkers) RN - 0 (Extracellular Matrix Proteins) RN - 0 (HAPLN4 protein, human) RN - 0 (Nerve Tissue Proteins) SB - IM MH - Agrin/*immunology MH - Autoantibodies MH - Biomarkers MH - Electrodiagnosis MH - Extracellular Matrix Proteins/*immunology MH - Female MH - Humans MH - Immunotherapy MH - Lambert-Eaton Myasthenic Syndrome/diagnosis/*immunology/therapy MH - Middle Aged MH - Nerve Tissue Proteins/*immunology MH - Treatment Outcome MH - Ulnar Nerve/physiopathology EDAT- 2019/11/20 06:00 MHDA- 2020/05/21 06:00 CRDT- 2019/11/20 06:00 PHST- 2019/11/20 06:00 [entrez] PHST- 2019/11/20 06:00 [pubmed] PHST- 2020/05/21 06:00 [medline] AID - 00131402-201912000-00006 [pii] AID - 10.1097/CND.0000000000000189 [doi] PST - ppublish SO - J Clin Neuromuscul Dis. 2019 Dec;21(2):103-106. doi: 10.1097/CND.0000000000000189.