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Retired NBME 23 Answers

nbme23/Block 1/Question#28 (reveal difficulty score)
An otherwise healthy 82-year-old man is ...
Posterior cord syndrome ๐Ÿ” / ๐Ÿ“บ / ๐ŸŒณ / ๐Ÿ“–
tags: neuro b12 vitamins

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 +27  upvote downvote
submitted by โˆ—sajaqua1(607)
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tsioreorP codr neorydsm ucsocr edu ot ifoirtnanc fo teh rtosproie lhaf of the laipns ,rcod omrf cocnlosiu of the eristopor slnpia treyr.a Our tnaeitp eptssren whti eedcarsde isoastenn to kinricpp olwbe the vlele of eht senek as elwl sa kaiwlng ihwt a eibde-dasw tgi,a lylkei iianigcdnt ssol of neo.ritpiocrppo The nptaite is aosl cmeain whit -eeeedytpghsrmn tuor.slehpni

neHesdepgymert ulnhtpreiso era ipayltcyl uedacs by an ibiinylat to emak uhogen DN,A esudac by a clak of sncsaeeyr srreporucs and ivatsnmi ucniiglnd 9B eaf)(olt nad 12B .)cboa(milna fI the aeptnit is tfaeol ed,etcfnii ew see vletedea myhnoeicoest nc.eciyefdi fI teh teinapt si 12B efcndit,ie we see eeetdval thocilelammyn iacd dna hiscyeoonmet .llevse omeiicoteapryHsmneyh nca ianrcsee bhso.smotri ohrTssoibm in eht osertirop iapnls etyarr anc uaesc ropsoreit dcro .esnmdroy In inaiddt,o klac fo mivaint B12 pirmias nliemy moaortinf dna slaed ot uaSecbtu dnbCimeo ieotgra,neenD hihwc fctesfa het acnaiSiolptmh tctra ngiutoc(cna rfo redceesda kcpnpiir a,tosiens)n lisncptaCrioo raTtc, and lrosaD l-noiaMudmleC ucieLsnms rTcat tinn(cgoacu rfo eht cdreeud ptpnoio.rripceo

)A nrAitreo ordc rnm-oydes osls of oomrt md,mcnoa as lwle as arlbelati sslo fo etha dna ,pain teh tteipna ash not tsol tormo ni,ncuoft os it tnnoca be sih.t B) lertCan ordc -oensrmdy stsernep as a bcatomoinni fo mootr nad sonyesr ,ssol ulsualy tihw dadebrl fyisducotn.n hTsi tpnatie osde not lsydapi mtoro slso ro dlarbed uy.cdtonsnfi )C cmHeoidr rnso-myed sAlo edllca -r,urdBwaqneoS tsih is ecetlpmo yrnjiu ot ehiert teh eftl or grith dies of het naispl oc.rd It steernsp whti trmoo nufodincyts dan exfelr ufoyntcsidn iertailpalsly ta teh lelve of teh ne;lsoi ssol fo preup orotm mmncaod bwelo the iesnlo lyelltiaprsia (spcatis psir;eas) lsso fo dralso deruicacl-ornm ientnsaos palelatrisily ta adn ewbol eht nelo;si and lsso fo apni dan umreaeprtet nntassioe elnllryacrttaao 2 ot 3 raeverbt welbo het ol.esni )E nregtSyame sdyn-omre a ntlaegncoi eiuflar to eeoldpv atrp fo teh lsianp .ordc heT wen nesot fo ysmtmsop ta 28 erysa dlo seakm hsti an eilkunyl ogisa,in.ds

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yb_26  izm,naag aknth uo!y +
aisel1787  agret neaxipontal +
rockodude  netinsaso to ipnrpcki is DCML c.trat SCD atfsfce eolpriacnbrlsee to(n tiamcsaholnip,) ictsciporon,al adn LDC.M wsotierhe doog inen.lpotaxa +4
azibird  iensnoatS to pirkcnpi is ont aodrls laem-lcimundo cmslnliea t,trca 'its osihpmaatncli trtac. oS hits aitpent ahs a iosnle of hte sldrao nmsu,lco hapnmscoaiitl crtat htyenpemedesrg ritpnsu,oehl adn miaena. Whta teh lleh si nggio ?no owH si hits ustj irrospeto dorc m?oesndyr nSilpctahiaom si not iseporrot rdco. +5
makingstrides  ikeL mtso of etshe n,eqstsiou kpic eth ctl/ssoe btes wrnse.a orF sesonra ea,obv siht si eth bste oen. +
skonys  F9A1 pg96 yssa B12 fnyeicidec easusc SCD DAN rtssehap.iasa iTsh tetnapi has rvpesgeriso saenrcseeedns/mubd kri,nppic tiaaxa ncr(rpollbeaseie ;mpa& C.)DLM Aols i'st omraittpn ot emebrmre that B9 nad 2B1 htbo vhae llbitomcaaseg mainae tbu 9B STOND'E vaeh geucloiloran mtsysp.om +1


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 +2  upvote downvote
submitted by โˆ—seagull(1933)
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1B2 ecyieicnfd dslae to tamyonedinil of the MLCD dna LSA hpwtaays ..e(i tosieorpr ocdr ronse)m.yd

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 +1  upvote downvote
submitted by โˆ—amarousis(27)
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tBu tdso'en uaesctbu iecmnobd deortegnenai deal ot parteiminm ni CL,DM elnsaplbcirreeo dan tspioriacconl ctrta? I gte hte cxatia tgia - lolecep/rnriaDCMbs.eL utB eht isnostane to ,picprkin t'udlnow thta be hte stahinpmilaoc ?attrc haTt is tno yaulusl dtceaffe in eusutbca oimbcend oet.ngerdiane

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krewfoo99  tI wlduo tcfaef eth lsdoar lcomun acttr dna eth piamlnschtoai ca.ttr It wont fctfea teh lposrceielbnear cartt sT(hu Reormsbg nigs ni 12B ifcnyieedc lwil be psoAi)tlviel teerh fo eth tatsrc rea fcafteed ni sdchieFrir aaAixt +
krewfoo99  ry.Sor uJts kechdce on F.A tI llwi saol ceffta hte rcseronpillaeeb cratt +
spow  sanotnieS ot ikipncpr si MCLD +
meli  RODUWL 6:5ID am"yn neattisp pldeove icroegloun aaistnnsefiomt due :to axnola agrnedienote of teh lphrirepae eerns,v eldgnia ot ,nsmsnbeu rspiteahs,ea dna rdpsdeese otomr fxee."rlse oS, I inkth eht neonaisst to cnrpkpii asw gnrsidecbi eth e!pteasahsri +


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 +0  upvote downvote
submitted by โˆ—masonkingcobra(408)
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aeylsnrolP ym ueiss wthi hsit etunqosi si ttah I gthouh 21B essuca nnlyiedoeiatm ni thbo het CLTS adn teh DLCM DSC)( but tyeh are tgsinet het maimcnehs erhe rlleay itwh het ewhol ehaonlymcmti aidc ibt nda het imarpeid emnliy yishtnsse

If e'uory oiurucs

p1thcal06usdc:/s/atir.2tera/eo.smcww6twcns/n

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 +0  upvote downvote
submitted by โˆ—krewfoo99(115)
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Can eonemso plexnia wath teh eptcuri si spospude ot ?swho sI it posuesdp to be temesdeng snh?rluoptie

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titanesxvi  yes od ot 12B cieifdceny +


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 +0  upvote downvote
submitted by โˆ—titanesxvi(106)
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reHe si a ogod esurreco

./lo_sgtlwwscssroprmb:dm/s.aoeyto/csdpnmue/ewdascleoekoihwn/_tnm_pIn

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 -1  upvote downvote
submitted by โˆ—cheeseheadkids(22)
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I sollaneyrp elfe this iestoqnu si sednimglia baeecsu het sols of crinpipk tsmntseoeadr slos of eth imocaihaslnpt actrt. hiTs is OTN atpr fo btcsuuea mdcnioeb dteeienganor due ot 1B2 icnidey.cfe

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