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Case ReportCase Report
Open Access

Unmasking the mimic: Leprosy neuropathy misdiagnosed as chronic inflammatory demyelinating polyneuropathy: A case report from Saudi Arabia

Muteb K. AlOtaibi, Bashaier G. AlQahtani and Raniah M. AlQawahmed
Neurosciences Journal April 2025, 30 (2) 157-161; DOI: https://doi.org/10.17712/nsj.2025.2.20240057
Muteb K. AlOtaibi
From the Department of Neurology (AlOtaibi, AlQahtani), Department of Neuropathology (AlQawahmed), Prince Sultan Military Medical City, Riyadh, Kingdom of Saudi Arabia
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Bashaier G. AlQahtani
From the Department of Neurology (AlOtaibi, AlQahtani), Department of Neuropathology (AlQawahmed), Prince Sultan Military Medical City, Riyadh, Kingdom of Saudi Arabia
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  • For correspondence: [email protected]
Raniah M. AlQawahmed
From the Department of Neurology (AlOtaibi, AlQahtani), Department of Neuropathology (AlQawahmed), Prince Sultan Military Medical City, Riyadh, Kingdom of Saudi Arabia
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    Figure 1

    - Multiple erythematous cutaneous lesions and joint swelling in her limbs.

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    Figure 2

    - Histopathologic findings of nerve biopsy.

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    Table 1

    - Clinical and histopathological features of leprosy neuropathy in our patient.

    Nerve conduction studiesPrior treatment historyHistopathologyEndoneurial fibrosisAcid-fast bacilliTreatment/follow-up
    Initial NCS findings indicate the presence of a combination of demyelinating and axonal sensory-motor polyneuropathy.Developed symptoms of neuropathy before and during the treatmentLepromatous leprosyNot presentPositiveTreatment still on-going
    Follow up NCS Showing signs of a mixed sensorimotor with secondary axonal loss polyneuropathy, compared to her last study there is no substantial change, and the picture is within expected time frame.     
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    Table 2

    - Timeline of patient’s case.

    DatesRelevant past medical history and interventions
    2 years prior to presentationOnset of widespread pruritus and erythematous cutaneous lesions, primarily affecting lower extremities
    DatesSummaries from initial and follow-up visitsDiagnostic testingInterventions
    Month 0Initial presentation with widespread pruritus, erythematous cutaneous lesions, and articulatory inflammation
    • - Rheumatology, metabolism, and infection tests: No notable abnormalities

    • - Immunoglobulin G levels: 49.2 g/L (elevated)

    • - CSF analysis: No notable abnormalities

     
    Month 6Development of paresthesia, tingling, and numbness  
    Month 8Initial medical evaluation:
    • - Reduced sensory reactions in L3, L4, L5 dermatomes

    • - Lack of vibration and proprioception in lower limbs

    • - Absent reflexes

    • - Bilateral strength rating: -4/5 in lower limbs, 4/5 in upper limbs

    Nerve conduction studies: Suggestive of combined demyelinating and axonal sensory-motor polyneuropathy 
    Month 9Diagnosis of CIDP based on nerve conduction studies  
    Month 10-11  Five consecutive IVIG treatments
    Month 12Significant decline in condition Sixth IVIG treatment
    Month 14 Sural nerve biopsy: Revealed lymph histiocytic infiltration and acid-fast bacilli
    Skin biopsy: Showed mixed dermal inflammation with non-necrotizing granuloma and acid-fast bacilli
     
    Month 15Diagnosis of leprosy confirmed  
    CurrentSigns of improvement Ongoing antibiotic treatment
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Neurosciences Journal: 30 (2)
Neurosciences Journal
Vol. 30, Issue 2
1 Apr 2025
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Unmasking the mimic: Leprosy neuropathy misdiagnosed as chronic inflammatory demyelinating polyneuropathy: A case report from Saudi Arabia
Muteb K. AlOtaibi, Bashaier G. AlQahtani, Raniah M. AlQawahmed
Neurosciences Journal Apr 2025, 30 (2) 157-161; DOI: 10.17712/nsj.2025.2.20240057

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Unmasking the mimic: Leprosy neuropathy misdiagnosed as chronic inflammatory demyelinating polyneuropathy: A case report from Saudi Arabia
Muteb K. AlOtaibi, Bashaier G. AlQahtani, Raniah M. AlQawahmed
Neurosciences Journal Apr 2025, 30 (2) 157-161; DOI: 10.17712/nsj.2025.2.20240057
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