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and temperature&#41; of left foot and pain of left hand present over a period of 4 years&#46; A physical examination revealed dorsal flexion deficit of the left foot&#44; superficial paraesthesia&#44; and dysesthesia of toes associated with impaired deep sensitivity&#46; In addition&#44; he presented paraesthesia and dysesthesia to the IV and V fingers of the left hand&#46; The left ulnar nerve was palpable and enlarged on the left elbow and no cutaneous lesions were found&#46; The research of Acid-Fast Bacillus &#40;AFBs&#41; in the nasal swab and the slit skin smears from earlobes and left elbow was negative&#46; Motor and sensory action potential of the left ulnar nerve&#44; left peroneal nerve&#44; left anterior and posterior tibial nerves are suggestive of mono-neuritis multiplex&#46; Magnetic Resonance Imaging &#40;MRI&#41; of the left elbow showed the enlarged ulnar nerve partially damaged by entrapment within the fibro-osseous tunnel&#46; Neurosurgery allowed the debridement of the ulnar nerve and&#44; at the same time&#44; the scraping of the perineural tissue&#46; ZN stain and PCR of the scraping were positive for the presence of <span class="elsevierStyleItalic">M&#46; leprae</span> and the diagnosis of tuberculoid leprae with PNL was made&#46; Antibodies against phenolic glycolipid-1 antigen &#40;anti-PGL antibody&#41; were negative&#46; A therapy based on a combination of three drugs &#40;rifampicin 600&#8239;mg once a month&#44; dapsone 100&#8239;mg daily&#44; and clofazimine 300&#8239;mg once a month and 50&#8239;mg daily&#41; associated with prednisone 25&#8239;mg and gabapentin 300&#8239;mg &#40;2 cp&#47;die&#41; was started with improvement of symptoms&#46;</p><p id="par0015" class="elsevierStylePara elsevierViewall">To the best of our knowledge&#44; this is the first case of PNL diagnosed through scraping&#44; ZN staining&#44; and PCR test&#46; Scraping is a technique that allows obtaining a clinical specimen rubbing a part of the body&#44; in our case myelin sheaths of a nerve&#46; The surface is scraped with a 15 Bard-Paker blade held at a right angle to the incision&#46; Upon scraping&#44; perineural tissue is obtained and examined by ZN staining and PCR test&#46; Traditionally&#44; diagnostic criteria for the diagnosis of PNL consist of nerve tissue samples obtained out of a nerve biopsy&#44; analysis of PCR&#44; and measure of anti-PGL-1 antibody levels&#46;<a class="elsevierStyleCrossRef" href="#bib0015"><span class="elsevierStyleSup">3</span></a> However&#44; the invasive procedure of nerve biopsy was criticized by Abhishek De et al&#46; because it has a high rate of complications&#46;<a class="elsevierStyleCrossRef" href="#bib0020"><span class="elsevierStyleSup">4</span></a> They proposed a simple technique of FNAC coupled with PCR in a pilot study<a class="elsevierStyleCrossRef" href="#bib0020"><span class="elsevierStyleSup">4</span></a> and they confirmed its efficacy in a 4-year study&#46;<a class="elsevierStyleCrossRef" href="#bib0025"><span class="elsevierStyleSup">5</span></a> In our case&#44; we did not use the technique of FNAC because an invasive procedure&#44; surgery&#44; was required to solve the compression of the ulnar nerve in the cubital tunnel&#46; However&#44; the scraping of the myelin sheath is a simple tissue sampling method during surgical procedures with less risk of nerve damage&#46;</p><span id="sec0005" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0005">Financial support</span><p id="par0020" class="elsevierStylePara elsevierViewall">None declared&#46;</p></span><span id="sec0010" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0010">Authors&#8217; contributions</span><p id="par0025" class="elsevierStylePara elsevierViewall">Ilaria Trave&#58; Conception and planning of the study&#59; elaboration and writing of the manuscript&#59; approval of the final version of the manuscript&#59; obtaining&#44; analyzing&#44; and interpreting the data&#59; effective participation in research orientation&#59; intellectual participation in propaedeutic and&#47;or therapeutic conduct of the cases studied&#59; critical review of the literature&#59; critical review of the manuscript&#46;</p><p id="par0030" class="elsevierStylePara elsevierViewall">Alberto Cavalchini&#58; Conception and planning of the study&#59; elaboration and writing of the manuscript&#59; approval of the final version of the manuscript&#59; obtaining&#44; analyzing&#44; and interpreting the data&#59; effective participation in research orientation&#59; intellectual participation in propaedeutic and&#47;or therapeutic conduct of the cases studied&#59; critical review of the literature&#59; critical review of the manuscript&#46;</p><p id="par0035" class="elsevierStylePara elsevierViewall">Gianfranco Barabino&#58; Conception and planning of the study&#59; elaboration and writing of the manuscript&#59; approval of the final version of the manuscript&#59; effective participation in research orientation&#59; intellectual participation in propaedeutic and&#47;or therapeutic conduct of the cases studied&#59; critical review of the literature&#59; critical review of the manuscript&#46;</p><p id="par0040" class="elsevierStylePara elsevierViewall">Aurora Parodi&#58; Conception and planning of the study&#59; elaboration and writing of the manuscript&#59; approval of the final version of the manuscript&#59; obtaining&#44; analyzing&#44; and interpreting the data&#59; effective participation in research orientation&#59; intellectual participation in propaedeutic and&#47;or therapeutic conduct of the cases studied&#59; critical review of the literature&#59; critical review of the manuscript&#46;</p></span><span id="sec0015" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0015">Conflicts of interest</span><p id="par0045" class="elsevierStylePara elsevierViewall">None declared&#46;</p></span></span>"
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Case Letter
A new diagnostic sampling method in pure neural leprosy: the scraping of the myelin sheath
Ilaria Travea,
Corresponding author
ilaria.trave@gmail.com

Corresponding author.
, Alberto Cavalchinib, Gianfranco Barabinob, Aurora Parodia
a Section of Dermatology - Department of Health Sciences, University of Genoa, IRCCS - Ospedale Policlinico San Martino, Genoa, Italy
b Section of Dermatology- Ospedale Policlinico San Martino, Genoa, Italy
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    "textoCompleto" => "<span class="elsevierStyleSections"><p id="par0005" class="elsevierStylePara elsevierViewall">Pure Neural Leprosy &#40;PNL&#41; is a form of leprosy characterized by neural involvement without any skin lesions&#46;<a class="elsevierStyleCrossRef" href="#bib0005"><span class="elsevierStyleSup">1</span></a> PNL affects about 3&#37;&#8211;10&#37; of patients with leprosy and it can occur in any spectrum&#44; although it is more frequent in the tuberculoid type&#46;<a class="elsevierStyleCrossRef" href="#bib0010"><span class="elsevierStyleSup">2</span></a> We present a case of a patient affected by PNL diagnosed through the scraping of myelin sheaths of the ulnar nerve&#44; Ziehl-Neelsen &#40;ZN&#41; staining&#44; and Polymerase Chain Reaction &#40;PCR&#41;&#46;</p><p id="par0010" class="elsevierStylePara elsevierViewall">A 78-year-old man&#44; a professional missioner in the Philippines and Papua New Guinea&#44; has presented sensory loss &#40;touch&#44; pain&#44; and temperature&#41; of left foot and pain of left hand present over a period of 4 years&#46; A physical examination revealed dorsal flexion deficit of the left foot&#44; superficial paraesthesia&#44; and dysesthesia of toes associated with impaired deep sensitivity&#46; In addition&#44; he presented paraesthesia and dysesthesia to the IV and V fingers of the left hand&#46; The left ulnar nerve was palpable and enlarged on the left elbow and no cutaneous lesions were found&#46; The research of Acid-Fast Bacillus &#40;AFBs&#41; in the nasal swab and the slit skin smears from earlobes and left elbow was negative&#46; Motor and sensory action potential of the left ulnar nerve&#44; left peroneal nerve&#44; left anterior and posterior tibial nerves are suggestive of mono-neuritis multiplex&#46; Magnetic Resonance Imaging &#40;MRI&#41; of the left elbow showed the enlarged ulnar nerve partially damaged by entrapment within the fibro-osseous tunnel&#46; Neurosurgery allowed the debridement of the ulnar nerve and&#44; at the same time&#44; the scraping of the perineural tissue&#46; ZN stain and PCR of the scraping were positive for the presence of <span class="elsevierStyleItalic">M&#46; leprae</span> and the diagnosis of tuberculoid leprae with PNL was made&#46; Antibodies against phenolic glycolipid-1 antigen &#40;anti-PGL antibody&#41; were negative&#46; A therapy based on a combination of three drugs &#40;rifampicin 600&#8239;mg once a month&#44; dapsone 100&#8239;mg daily&#44; and clofazimine 300&#8239;mg once a month and 50&#8239;mg daily&#41; associated with prednisone 25&#8239;mg and gabapentin 300&#8239;mg &#40;2 cp&#47;die&#41; was started with improvement of symptoms&#46;</p><p id="par0015" class="elsevierStylePara elsevierViewall">To the best of our knowledge&#44; this is the first case of PNL diagnosed through scraping&#44; ZN staining&#44; and PCR test&#46; Scraping is a technique that allows obtaining a clinical specimen rubbing a part of the body&#44; in our case myelin sheaths of a nerve&#46; The surface is scraped with a 15 Bard-Paker blade held at a right angle to the incision&#46; Upon scraping&#44; perineural tissue is obtained and examined by ZN staining and PCR test&#46; Traditionally&#44; diagnostic criteria for the diagnosis of PNL consist of nerve tissue samples obtained out of a nerve biopsy&#44; analysis of PCR&#44; and measure of anti-PGL-1 antibody levels&#46;<a class="elsevierStyleCrossRef" href="#bib0015"><span class="elsevierStyleSup">3</span></a> However&#44; the invasive procedure of nerve biopsy was criticized by Abhishek De et al&#46; because it has a high rate of complications&#46;<a class="elsevierStyleCrossRef" href="#bib0020"><span class="elsevierStyleSup">4</span></a> They proposed a simple technique of FNAC coupled with PCR in a pilot study<a class="elsevierStyleCrossRef" href="#bib0020"><span class="elsevierStyleSup">4</span></a> and they confirmed its efficacy in a 4-year study&#46;<a class="elsevierStyleCrossRef" href="#bib0025"><span class="elsevierStyleSup">5</span></a> In our case&#44; we did not use the technique of FNAC because an invasive procedure&#44; surgery&#44; was required to solve the compression of the ulnar nerve in the cubital tunnel&#46; However&#44; the scraping of the myelin sheath is a simple tissue sampling method during surgical procedures with less risk of nerve damage&#46;</p><span id="sec0005" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0005">Financial support</span><p id="par0020" class="elsevierStylePara elsevierViewall">None declared&#46;</p></span><span id="sec0010" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0010">Authors&#8217; contributions</span><p id="par0025" class="elsevierStylePara elsevierViewall">Ilaria Trave&#58; Conception and planning of the study&#59; elaboration and writing of the manuscript&#59; approval of the final version of the manuscript&#59; obtaining&#44; analyzing&#44; and interpreting the data&#59; effective participation in research orientation&#59; intellectual participation in propaedeutic and&#47;or therapeutic conduct of the cases studied&#59; critical review of the literature&#59; critical review of the manuscript&#46;</p><p id="par0030" class="elsevierStylePara elsevierViewall">Alberto Cavalchini&#58; Conception and planning of the study&#59; elaboration and writing of the manuscript&#59; approval of the final version of the manuscript&#59; obtaining&#44; analyzing&#44; and interpreting the data&#59; effective participation in research orientation&#59; intellectual participation in propaedeutic and&#47;or therapeutic conduct of the cases studied&#59; critical review of the literature&#59; critical review of the manuscript&#46;</p><p id="par0035" class="elsevierStylePara elsevierViewall">Gianfranco Barabino&#58; Conception and planning of the study&#59; elaboration and writing of the manuscript&#59; approval of the final version of the manuscript&#59; effective participation in research orientation&#59; intellectual participation in propaedeutic and&#47;or therapeutic conduct of the cases studied&#59; critical review of the literature&#59; critical review of the manuscript&#46;</p><p id="par0040" class="elsevierStylePara elsevierViewall">Aurora Parodi&#58; Conception and planning of the study&#59; elaboration and writing of the manuscript&#59; approval of the final version of the manuscript&#59; obtaining&#44; analyzing&#44; and interpreting the data&#59; effective participation in research orientation&#59; intellectual participation in propaedeutic and&#47;or therapeutic conduct of the cases studied&#59; critical review of the literature&#59; critical review of the manuscript&#46;</p></span><span id="sec0015" class="elsevierStyleSection elsevierViewall"><span class="elsevierStyleSectionTitle" id="sect0015">Conflicts of interest</span><p id="par0045" class="elsevierStylePara elsevierViewall">None declared&#46;</p></span></span>"
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Article information
ISSN: 03650596
Original language: English
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