PMID- 32830177 OWN - NLM STAT- MEDLINE DCOM- 20210414 LR - 20210414 IS - 1349-7235 (Electronic) IS - 0918-2918 (Print) IS - 0918-2918 (Linking) VI - 60 IP - 1 DP - 2021 Jan 1 TI - Anti-MuSK Positive Myasthenia Gravis with Anti-Lrp4 and Anti-titin Antibodies. PG - 137-140 LID - 10.2169/internalmedicine.4957-20 [doi] AB - In addition to muscle nicotinic acetylcholine receptor (AChR) and muscle-specific kinase (MuSK), low-density lipoprotein receptor (Lrp4) has recently been discovered to be a novel target antigen among patients with seronegative myasthenia gravis (MG). We herein report the findings of a 62-year-old patient who showed positivity for anti-MuSK, anti-Lrp4, and anti-titin antibodies. The patient developed MG crisis following a 10-year history of intermittent double vision with ptosis, and a 7-year history of dropped head. Our detailed clinical, laboratory, and therapeutic descriptions highlight its unique characteristics of anti-MuSK-antibody positive MG accompanied by anti-Lrp4 and anti-titin antibodies. FAU - Yamashita, Rika AU - Yamashita R AD - Department of Neurology, Osaka University Hospital, Japan. FAU - Shimizu, Mikito AU - Shimizu M AD - Department of Neurology, Osaka University Hospital, Japan. FAU - Baba, Kousuke AU - Baba K AD - Department of Neurology, Osaka University Hospital, Japan. FAU - Beck, Goichi AU - Beck G AD - Department of Neurology, Osaka University Hospital, Japan. FAU - Kinoshita, Makoto AU - Kinoshita M AD - Department of Neurology, Osaka University Hospital, Japan. FAU - Okuno, Tatsusada AU - Okuno T AD - Department of Neurology, Osaka University Hospital, Japan. FAU - Higuchi, Osamu AU - Higuchi O AD - Department of Clinical Research, Nagasaki Kawatana Medical Center, Japan. FAU - Mochizuki, Hideki AU - Mochizuki H AD - Department of Neurology, Osaka University Hospital, Japan. LA - eng PT - Case Reports PT - Journal Article DEP - 20200822 PL - Japan TA - Intern Med JT - Internal medicine (Tokyo, Japan) JID - 9204241 RN - 0 (Autoantibodies) RN - 0 (Connectin) RN - 0 (LDL-Receptor Related Proteins) RN - 0 (Receptors, LDL) RN - 0 (Receptors, Nicotinic) SB - IM MH - Autoantibodies MH - Connectin MH - Humans MH - LDL-Receptor Related Proteins MH - Middle Aged MH - *Myasthenia Gravis/drug therapy MH - Receptors, LDL MH - *Receptors, Nicotinic PMC - PMC7835456 OTO - NOTNLM OT - anti-Lrp4 antibody OT - anti-MuSK antibody OT - anti-titin antibody OT - myasthenia gravis OT - steroid pulse therapy COIS- The authors state that they have no Conflict of Interest (COI). EDAT- 2020/08/25 06:00 MHDA- 2021/04/15 06:00 PMCR- 2021/01/01 CRDT- 2020/08/25 06:00 PHST- 2020/08/25 06:00 [pubmed] PHST- 2021/04/15 06:00 [medline] PHST- 2020/08/25 06:00 [entrez] PHST- 2021/01/01 00:00 [pmc-release] AID - 10.2169/internalmedicine.4957-20 [doi] PST - ppublish SO - Intern Med. 2021 Jan 1;60(1):137-140. doi: 10.2169/internalmedicine.4957-20. Epub 2020 Aug 22.