Bariatric surgery

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In surgery, Bariatric surgery is defined as "surgical procedures aimed at affecting metabolism and producing major weight reduction in patients with morbid obesity."[1]


Neurologic complications have been reviewed[2].


Thiamine deficiency after bariatric surgery has been reported to display demyelination by nerve conduction study[3] although per Shible, citing the two Koike reports, this may be late stage finding[4] and due to severe protein calorie malnutrition[5].

After bariatric surgery, 6% of patients developed polyneuropathy (none showed demyelination although inflammation was present) [6]. One form of neuropathy is beriberi from thiamine deficiency[7]. However, both axonal and demyelination have been reported[8]. See Beriberi other diagnostic studies.

However, demyelination after bariatric surgery may be associated with:

See also

External links


  1. Anonymous (2023), Bariatric surgery (English). Medical Subject Headings. U.S. National Library of Medicine.
  2. Landais A (2014). "Neurological complications of bariatric surgery". Obes Surg. 24 (10): 1800–7. doi:10.1007/s11695-014-1376-x. PMID 25060718.
  3. Koike H, Misu K, Hattori N, Ito S, Ichimura M, Ito H; et al. (2001). "Postgastrectomy polyneuropathy with thiamine deficiency". J Neurol Neurosurg Psychiatry. 71 (3): 357–62. doi:10.1136/jnnp.71.3.357. PMC 1737557. PMID 11511711. "Unmyelinated fibre density was also decreased (998 to 16 956 fibres/mm2). In teased fibre studies, the frequency of fibres with axonal degeneration ranged from 1% to 96%, while segmental demyelination and remyelination were rare"
  4. Shible AA, Ramadurai D, Gergen D, Reynolds PM (2019). "Dry Beriberi Due to Thiamine Deficiency Associated with Peripheral Neuropathy and Wernicke's Encephalopathy Mimicking Guillain-Barré syndrome: A Case Report and Review of the Literature". Am J Case Rep. 20: 330–334. doi:10.12659/AJCR.914051. PMC 6429982. PMID 30862772. "Neuronal biopsies from affected tissues from patients with dry beriberi have been reported to show predominantly axonal degeneration and progression to demyelination in end-stage disease"
  5. Chopra JS, Dhand UK, Mehta S, Bakshi V, Rana S, Mehta J (1986). "Effect of proteincalorie malnutrition on peripheral nerves. A clinical, electrophysiological and histopathological study". Brain. 109 ( Pt 2): 307–23. doi:10.1093/brain/109.2.307. PMID 3082465.
  6. Thaisetthawatkul P, Collazo-Clavell ML, Sarr MG, Norell JE, Dyck PJ (2004). "A controlled study of peripheral neuropathy after bariatric surgery". Neurology. 63 (8): 1462–70. doi:10.1212/01.wnl.0000142038.43946.06. PMID 15505166.
  7. Stroh C, Meyer F, Manger T (2014). "Beriberi, a severe complication after metabolic surgery - review of the literature". Obes Facts. 7 (4): 246–52. doi:10.1159/000366012. PMC 5644786. PMID 25095897.
  8. Philippi N, Vinzio S, Collongues N, Vix M, Boehm N, Tranchant C; et al. (2011). "[Peripheral neuropathies after bariatric surgery]". Rev Neurol (Paris). 167 (8–9): 607–14. doi:10.1016/j.neurol.2011.01.011. PMID 21514611.
  9. Amin A, Khoury NC, Lacayo M, Kostanyan S (2022). "Copper Deficiency-Induced Neuropathy After Bariatric Surgery Disguised as Demyelinating Disease: A Case Report". Cureus. 14 (2): e22705. doi:10.7759/cureus.22705. PMC 8967068 Check |pmc= value (help). PMID 35386142 Check |pmid= value (help).
  10. Landais AF (2014). "Rare neurologic complication of bariatric surgery: acute motor axonal neuropathy (AMAN), a severe motor axonal form of the Guillain Barré syndrome". Surg Obes Relat Dis. 10 (6): e85–7. doi:10.1016/j.soard.2014.02.019. PMID 24913591.
  11. Ishaque N, Khealani BA, Shariff AH, Wasay M (2015). "Guillain-Barré syndrome (demyelinating) six weeks after bariatric surgery: A case report and literature review". Obes Res Clin Pract. 9 (4): 416–9. doi:10.1016/j.orcp.2015.02.001. PMID 25765350.. The report stated "fully compliant with the recommended diet plan and vitamin supplements" although these levels were not reported for confirmation.