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- W2082474808 abstract "Abstract Objective: Occasionally, diabetic patients develop painless, lower‐limb, motor predominant neuropathy. Whether this is a variant of diabetic lumbosacral radiculoplexus neuropathy (DLRPN) (a painful disorder from ischemic injury and microvasculitis), a variant of chronic inflammatory demyelinating polyradiculoneuropathy (CIDP) or another disorder is unsettled. Here, we characterize the clinical and pathological features of painless diabetic motor predominant neuropathy. Methods: We identified patients with this syndrome who underwent nerve biopsy. We compared pathological features to 33 DLRPN and 25 CIDP biopsies. Results: 23 patients were identified (22 had type 2 diabetes mellitus); 12 men; median age 62.2 years (range 36–78); median weight loss 30 pounds (range 0–100). Overall, the clinical features were similar to DLRPN except painless patients had more symmetrical and upper limb involvement, with slower progression and more severe impairment. Physiological testing demonstrated pan‐modality sensory loss, autonomic abnormalities and axonal polyradiculoneuropathies. Nerve biopsies were similar to DLPRN showing ischemic injury (multifocal fiber loss [11/23], perineural thickening [18/23], injury neuroma [11/23], neovascularization [17/23]) and evidence of altered immunity and microvasculitis (epineurial perivascular inflammation [23/23], prior bleeding [11/23], vessel wall inflammation [15/23], and microvasculitis [3/23]). In contrast, CIDP biopsies did not show ischemic injury or microvasculitis but revealed demyelination and onion‐bulbs. Interpretation: 1) Painless diabetic motor neuropathy is painless DLRPN and not CIDP and is caused by ischemic injury and microvasculitis. 2) The clinical features of painless DLRPN are different from typical DLPRN being more insidious and symmetrical with slower evolution. 3) The slower evolution may explain the lack of pain. Ann Neurol 2010;" @default.
- W2082474808 created "2016-06-24" @default.
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- W2082474808 date "2011-03-18" @default.
- W2082474808 modified "2023-10-18" @default.
- W2082474808 title "Painless diabetic motor neuropathy: A variant of diabetic lumbosacral radiculoplexus Neuropathy?" @default.
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- W2082474808 doi "https://doi.org/10.1002/ana.22334" @default.
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