PMID- 34722084 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20211102 IS - 2168-8184 (Print) IS - 2168-8184 (Electronic) IS - 2168-8184 (Linking) VI - 13 IP - 9 DP - 2021 Sep TI - Chronic Immune Sensory Polyradiculoneuropathy-Plus With Diffuse Enlarged Dorsal Root Ganglion and Positive Serum Human Leukocyte Antigen (HLA)-B27. PG - e18320 LID - 10.7759/cureus.18320 [doi] LID - e18320 AB - The peripheral nerve is usually spared in chronic immune sensory polyradiculoneuropathy (CISP) according to a literature review; however, an extended-spectrum of CISP, CISP-plus, was introduced recently. Here we report a 29-year-old Taiwanese man who presented with numbness and hypoesthesia in all distal extremities, tightness sensation in the left posterior thigh, and sensory ataxia for three months. The clinical and neurophysiological examinations revealed proximal sensory abnormalities along with sural nerve involvement. The elevated protein level of cerebrospinal fluid (CSF) was noted and enlarged dorsal root ganglia were seen on the magnetic resonance imaging (MRI) of the whole spine. Autoimmune workup showed only positive human leukocyte antigen (HLA)-B27. Biopsy of the sural nerve revealed inflammatory demyelinating neuropathy. Only mild improvement was noted after methylprednisolone pulse therapy (1,000mg/day) for three days, and he was then treated with intravenous immunoglobulin with the dosage of 2g/kg-BW followed by azathioprine, and objective improvements were reported. Different from the previous case reports, CISP may also associate with peripheral nerve involvements. A sural nerve biopsy could assist the diagnosis. Further investigation is needed for the possible immune association between CISP-plus and HLA-B27. CI - Copyright (c) 2021, Huang et al. FAU - Huang, I-Chen AU - Huang IC AD - Department of Neurology, Taipei Municipal Wan Fang Hospital, Taipei Medical University, Taipei, TWN. AD - Taipei Neuroscience Institute, Taipei Medical University, Taipei, TWN. FAU - Chen, Wei-Yu AU - Chen WY AD - Department of Pathology, Taipei Municipal Wan Fang Hospital, Taipei Medical University, Taipei, TWN. AD - Department of Pathology, School of Medicine, College of Medicine, Taipei Medical University, Taipei, TWN. FAU - Sung, Jia-Ying AU - Sung JY AD - Department of Neurology, Taipei Municipal Wan Fang Hospital, Taipei Medical University, Taipei, TWN. AD - Taipei Neuroscience Institute, Taipei Medical University, Taipei, TWN. AD - Department of Neurology, School of Medicine, College of Medicine, Taipei Medical University, Taipei, TWN. FAU - Huang, Chih-Shan AU - Huang CS AD - Department of Neurology, Taipei Municipal Wan Fang Hospital, Taipei Medical University, Taipei, TWN. AD - Taipei Neuroscience Institute, Taipei Medical University, Taipei, TWN. LA - eng PT - Case Reports DEP - 20210927 PL - United States TA - Cureus JT - Cureus JID - 101596737 PMC - PMC8549490 OTO - NOTNLM OT - ataxia OT - azathioprine treatment OT - chronic immune sensory polyradiculoneuropathy OT - steroid treatment OT - sural nerve biopsy COIS- The authors have declared that no competing interests exist. EDAT- 2021/11/02 06:00 MHDA- 2021/11/02 06:01 PMCR- 2021/09/27 CRDT- 2021/11/01 09:21 PHST- 2021/09/27 00:00 [accepted] PHST- 2021/11/01 09:21 [entrez] PHST- 2021/11/02 06:00 [pubmed] PHST- 2021/11/02 06:01 [medline] PHST- 2021/09/27 00:00 [pmc-release] AID - 10.7759/cureus.18320 [doi] PST - epublish SO - Cureus. 2021 Sep 27;13(9):e18320. doi: 10.7759/cureus.18320. eCollection 2021 Sep.