Lambert-Eaton 肌无力综合征 (LEMS) 的预后由是否患有潜在的癌症及其类型、是否患有相关的自身免疫性疾病及其严重程度和无力的严重程度与分布来决定。
与癌症相关 (CA-LEMS)
长期预后由潜在癌症的预后及其复发率决定。与 LEMS 相关的小细胞肺癌预后较好(15 至 17 个月,与 9 至 10 个月的生存期相比),尽管这可能是因为较早检查出肿瘤。[5]Titulaer MJ, Verschuuren JJ. Lambert-Eaton myasthenic syndrome: tumor versus nontumor forms. Ann N Y Acad Sci. 2008;1132:129-134.http://www.ncbi.nlm.nih.gov/pubmed/18567862?tool=bestpractice.com[49]Maddison P, Newsom-Davis J, Mills KR, et al. Favourable prognosis in Lambert-Eaton myasthenic syndrome and small-cell lung carcinoma. Lancet. 1999;353:117-118.http://www.ncbi.nlm.nih.gov/pubmed/10023900?tool=bestpractice.com随着癌症治疗有效,无力通常也有所改善。[50]Chalk CH, Murray NM, Newsom-Davis J, et al. Response of the Lambert-Eaton myasthenic syndrome to treatment of associated small-cell lung carcinoma. Neurology. 1990;40:1552-1556.http://www.ncbi.nlm.nih.gov/pubmed/2170866?tool=bestpractice.com
与癌症无关但作为更普遍自身免疫状况的一部分 (NCA-LEMS)
近端肌肉力量的初始水平被证明与长期结局有关,但与电生理学所见和抗电压门控性钙通道抗体水平值均无关。[40]Maddison P, Lang B, Mills K, et al. Long term outcome in Lambert-Eaton myasthenic syndrome without lung cancer. J Neurol Neurosurg Psychiatry. 2001;70:212-217.http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1737207/pdf/v070p00212.pdfhttp://www.ncbi.nlm.nih.gov/pubmed/11160470?tool=bestpractice.com多达半数患者服用大剂量免疫抑制药物后会达到持续临床缓解。[40]Maddison P, Lang B, Mills K, et al. Long term outcome in Lambert-Eaton myasthenic syndrome without lung cancer. J Neurol Neurosurg Psychiatry. 2001;70:212-217.http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1737207/pdf/v070p00212.pdfhttp://www.ncbi.nlm.nih.gov/pubmed/11160470?tool=bestpractice.com大部分患者采取治疗措施后会长期残疾。NCA-LEMS 似乎并没有减少预期寿命。