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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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eoorirsPt droc rnsymdeo cosurc deu to aictonfrni fo hte pisrtoreo afhl fo teh lsinap rdoc, ofrm cuonlcosi fo hte itrooserp nislap ety.rar Our paittne tnrspsee itwh eercsedad tsisnaeno to pinprikc lboew the vllee fo hte nseke sa wlel sa klawnig hwit a aeddiws-be tiag, lleyik itaingndic ssol fo ptpnporiei.roco heT piteatn is losa neamci whti dygrhtnemeeps-e nturpseoilh.

dneeympHteergs tishenpruol rae cyaipllty esaudc by an ibyinaitl to aekm geohun DN,A sacedu yb a clak fo easyncrse urpsoesrrc dna atnivsim iiucdgnnl 9B e(oa)tfl nda 12B .bmacno)l(ia fI het ttnipea si faloet f,etindiec we ese letdvaee eoeiytmohsnc cecnyi.ifed If eht pneiatt si B21 infdict,ee ew see eeadetvl alnemohyitmlc dcai nda noohcisyteem sel.elv ayrnceitmoHimeshepyo anc enecsira th.osbiorms srsoombihT ni het iotsrpeor psinla retayr can uacse roperiost dcor r.ysmdneo In dd,toinai kalc of imnaitv B21 ripmasi nymlei fiomaotrn dan easld ot uaeubtcS Cdnbomie oDi,nenaergte cwhhi fsfatce teh lpaatciinmSho tract anogcut(nci rfo cedadeers npcikirp nso,ntsiae) rtnciiasloCpo art,cT adn aDorls MuoCemdiln-al Lsuscniem trcaT itugo(ccnan orf teh uddcree pteo.croppniori

A) onrreAti ordc -yrsndoem loss of otrmo cm,dmoan sa lewl sa arbtleail sols of athe dan ai,np teh eainttp hsa ton stlo tomro nu,fitnco so ti ncoant be ti.sh B) relaCtn docr omny-ders speenstr as a toinmicanbo fo rmoot dna syerson s,ols lysaluu iwth dreabdl sncuo.ifdtny Thsi tenapti edso ton ayspidl rootm slos or breddal tcfod.nuynsi C) midoHcer derosmyn- lsoA ledlac urrwSqBeod,a-n hits si eomctpel iujynr ot teihre teh eflt or itgrh ides of hte sinapl rod.c It eepsrsnt wiht omotr nnsudoficyt adn rleefx ntdcuyonsif lripiaaltysle ta the lelev of eth ;nsoiel lsos fo eppur motro cnmaomd elobw the lonsei ieyslptllaair (ssacipt ;a)sreisp slso of asrdlo -lramceciodurn nosesatin erilslatiapyl at dan weblo the oisne;l and loss of ipna nda eutptarrmee ineotasns yaletllorcraatn 2 to 3 ertarvbe ebolw the l.soeni )E yngreStmae o-drnesmy a inaenctolg ileufar ot opdvlee aprt of the niapls ro.dc hTe wne esotn of ymtpmsos ta 82 sraey dlo asekm tsih an llikueyn g.insiasdo,

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yb_26  z,aagnmi anhtk uoy! +
aisel1787  egtra pltneinoxaa +
rockodude  osseitann ot inrpicpk si MLCD cr.att SCD fecfsat ioerlcnpeeralbs o(nt cnamop,tiiah)ls ircactsooni,lp dan C.LDM hrsoieetw dogo nnx.eapaitol +4
azibird  tSaeonnsi to pirnpikc is nto orasdl -almcmlunioed smceilaln trt,ca tsi' csoitaplhmani cr.tta So tshi teaptin ash a neolsi fo the rlosad u,nocmsl ptlaincmsiaho trcat mpentyedrhegse rshnetpl,iuo and na.eima hWat teh lhel is ongig o?n owH si tihs tjus estoriorp dorc myos?ernd npaiiStlaomch si ont ristopore c.rod +5
makingstrides  Lkei somt fo eesth tsuoqsei,n cipk eht ostce/sl ebts sr.nawe For nesaors beo,av ihts si the bset .oen +
skonys  91AF p9g6 assy 2B1 cyeefnicdi causse DCS AND iahprs.asteas siTh ietnatp ahs rieevprssog anrdsecse/subdneme ikr,pincp xaiaat ilcrrepaeslbn(oe p&am; LM.CD) loAs t'si rtmnpoiat to emrmbree tath 9B and 1B2 thbo aveh ctailsmolbage mnaeai tub 9B DNESOT' veah nrooilglauce so.tpmsmy +1



 +2  upvote downvote
submitted by โˆ—seagull(1933)
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2B1 eeicniydfc edlas ot doiymnealnti of hte CMDL dna LSA ahswpaty (.ei. oeprrtois dcro y).emdrons

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 +1  upvote downvote
submitted by โˆ—amarousis(27)
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But eot'sdn bcaseuut biconmed aeterenngdoi dale ot ipmanretmi ni CLM,D oacellrpibresen and aplconotrciis t?rtca I teg the xtiaac tgai - cloerlsLeanCbrei.pDM/ utB teh isannsote to ,pkncrpii wutdoln' atth eb het ptnliaimcahso trc?at hTat si tno lluusya tffeecda in bcuauest cbidmone eraeond.gntei

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krewfoo99  tI ludwo tffaec the radlso ucomln acrtt and hte iichposatnalm crtta. tI tnwo feftca eht crloeisaelrpneb artct ush(T sgmrbRoe gsni ni 12B cdinicfeey liwl eb plltAii)osev etreh fo eht ractst are etdfcefa ni rFiircehsd Aiatax +
krewfoo99  rySro. tusJ ckhdcee no AF. tI ilwl aols efctfa het ecbalelrnpireos ctatr +
spow  osietaSnn ot pikincrp si LMDC +
meli  OWRDUL I:56D anmy" seanptti vpeledo ooulneicgr nasmnifetstaio edu o:t xaolna tgeedrenoani fo eth hielprrpae ,rsvnee genidla ot smes,nubn sahiares,etp adn dspeedsre tromo exerl.e"sf ,oS I tnkhi het tansenios ot crknipip swa idrgiebcns eht aaehisrespt! +



 +0  upvote downvote
submitted by โˆ—masonkingcobra(408)
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eolanPyslr ym esius whit iths oiteunqs si hatt I uhgoht B12 suceas ynedaitmoelni ni othb eth STCL and teh CLDM C)(SD tub hyte era eigtnts the eimhncsam erhe eallry hwit eht howle neaioylmtmch idca itb nad eht mpdrieai yienml systhnies

If o'ruye uoiursc

estw0/r/u/.6wnop62nri.cssdlac:cwamtscea/tth1

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 +0  upvote downvote
submitted by โˆ—krewfoo99(115)
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nCa mnoseoe pixneal ahtw het ieptcur si pdpsoesu to wosh? Is ti soeudpps ot be nesgeedtm epinrutlosh?

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titanesxvi  sey od ot B12 ieencydfci +



 +0  upvote downvote
submitted by โˆ—titanesxvi(106)
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eHer si a dgoo rcruesoe

nh/lemeets_a/tckrg.c//eopdwe.uaorm_ptpoylnssdswnInw:dsoim_mbwlsooc/s

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 -1  upvote downvote
submitted by โˆ—cheeseheadkids(22)
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I llansoepry elef tsih soutinqe si mingsilade suecbea the lsos of pknipric sertotmsnead ossl fo the tinoapmichals attc.r Thsi si ONT arpt of ucuastbe doebcmni agneiterndeo edu to B12 ndice.cyfie

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