09 February 2026
: Case report 
Successful Treatment of Multifocal Demyelinating Sensory-Motor Neuropathy (Lewis-Sumner Syndrome) With Rituximab: A Case Report
Challenging differential diagnosis, Unusual or unexpected effect of treatment, Rare disease
Mengcui Gui BCEF 1,2, Jing Lin BF 1,2, Yue Li
B 1,2, Bo Chen B 1,2, Bitao Bu AG 1,2, Zhijun Li AFG 1,2*
DOI: 10.12659/AJCR.950084
Am J Case Rep 2026; 27:e950084
Figure 2 Electromyogram study of the left lower limbs. In the left tibial nerve and peroneal nerve, DML was delayed and MCV was slowed. Meanwhile, SCV of the left superficial peroneal nerve and sural nerve was slowed. (A) DML and MCV in the left tibial nerve; (B) DML and MCV in the left peroneal nerve; (C) SCV and SNAP in the left superficial peroneal nerve; (D) SCV and SNAP in the left sural nerve. MCV – motor nerve conduction velocity; DML – distal motor latency; SCV – sensory nerve conduction velocity; SNAP – sensory nerve action potential amplitude.