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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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ePsrtoori odcr deosnmry sccrou ued ot contairifn fo het rpitoores flah fo eth lasinp ,rocd mrof cnoiolcsu fo eth rosopteir aplisn r.yeatr rOu etnatpi etpsnrse tihw dadecseer antnossei to irinpckp elbwo eth lelev fo teh nksee as well as nalgikw hiwt a -ebdsiwead g,tai lliyke tnidacingi loss fo nrropii.pcopteo hTe epattin is laso mecina thiw pemrehgdnsye-et epluns.rtohi

denesmHyeegrpt nhtorlseipu rae yiatllycp dsceau yb an ibatlniyi ot akem oenugh DN,A eucads by a clak fo ayersensc srscreporu nda vinistam iincgdlnu 9B a)oe(ftl nda 12B m.a)(bacnloi If hte ainpett si olatfe ,teeiidncf we ees taeevled eiomysntheco cd.enyciief If eth itpaent is B12 nitedec,fi we ese eeedltav lyneohimctalm caid adn eycenmohosit llese.v itpoeeyomiHersynchma nac isnearce hsbtoomrsi. bTsmorsohi ni eht reosrtoip alnsip teryra nca ecasu oirptreos drco er.odysmn In doadn,iti lack of itnvmai 21B aimipsr mneliy tmrfoanio nad esadl ot ubctaueS dmebConi De,nogenraiet hwihc fcaftse teh pihlaaonStimc attcr ccinntg(uoa rof dadrseece iniprpck )isn,estnoa npirColocasti ct,raT nad Doasrl aid-CemonuMll sesnmcuLi ctaTr onc(niaugct rof eht curdeed cpriteporonoi.p

)A tieonArr rodc remny-sdo slos fo romot nm,ocmad as ellw as iletrabla lsso fo ehat nda ,anip hte niettpa sah tno slot toorm nfoni,cut os ti aontcn be ih.ts B) rtClane odcr odym-rens rpsnetes as a oiinatcnmbo of rmoto and orssyen ssol, ylauuls whit eddlrba fcsoit.dnynu Tihs pinteta edos ont dayislp rotom sslo or bedarld tcosydfin.nu )C Hmcioder ydm-esonr lAso llecad rq-Sarwnd,Beou hist is eeolcpmt niujyr ot hereit eht lfte ro rtigh esdi of hte palisn codr. tI nstsrpee tiwh mtoor csduoitnfyn nda felrex ydcnsotfuin iritesallyalp at hte elvel of het sli;oen sols fo uperp ootmr mdnmoac oeblw eth snlieo leypslaliriat (siacpts sp;is)rae sslo of lsarod ecloam-urrnidc nsonastie tiyasillaelrp at adn wbeol eht ileno;s adn slos of anip nda metrurpeeat astioesnn nlratetoaryallc 2 to 3 evreatrb olbwe eth snelio. )E mgeyaSrtne yos-rdenm a alteiongcn elrfuia to edloevp tpar fo the nslaip cod.r Teh new ensto of omspytms at 28 eysra old keams hits an ykinelul iigo,s.dsan

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yb_26  i,magazn tnakh !uyo +
aisel1787  retga naoexlatpni +
rockodude  inasetnso ot rpncipki is DMCL r.ttac CSD scefaft orrcsebeenilpal (ton sai)ocapithm,ln lporicotcisn,a and MCD.L rotwieesh dogo p.oaxatlenin +4
azibird  aisnSnote ot pcrinikp si otn ordsla cmuillnmaeo-d mallnseci tart,c 'tsi scmlapnatioih .tactr oS siht ateptin hsa a lonesi fo eht oldsra lumno,sc chtaompnliisa rttca deyhnmesetgepr oerpsihnl,ut nda .eiaman thaW eht llhe is gngio o?n oHw si tsih sutj erioprtos dcor yedo?nmrs pimioahtlanSc si ton iotpseror .rdco +5
makingstrides  eikL stom of thees ontiqeus,s kcip the se/otlsc bset ewsnar. For esrnsao aobv,e tsih is het tbse ne.o +
skonys  F19A p96g ayss 1B2 eiincdyecf scasue SDC ADN itaa.aspsrehs ihsT taptien sah esrsrigvope rbsena/meuesdcdens kiipn,prc taaaxi ellisareor(cbenp &;map ).LCDM Asol i'st pmritotan to ebrmmree atht 9B adn B21 htob vhae sbeagcatllomi aneiam ubt B9 'DSOETN ahve ulolcrnaogei ysot.spmm +1



 +2  upvote downvote
submitted by โˆ—seagull(1933)
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2B1 fniicdeyec edlas ot niaoinmdylet fo eth MCLD dan LAS wystahpa ie..( oirtprseo orcd nmers.)doy

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 +1  upvote downvote
submitted by โˆ—amarousis(27)
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tuB oes'tdn basuutce bmoeicnd egedaontrnie lead to tmrieimpna ni DM,LC clrbrieaeepsonl nda lasctoricopin tra?ct I etg teh xatiac giat - rsD.pbalceel/irneMoLC Btu het toninessa ot ppcn,irki twdo'uln ttha eb eth omcalpthiasni ?ctrat Ttha is not aululsy tacdeeff in uatcsbue noimbdec ogaednertnie.

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krewfoo99  It dowul fcfate eth adlsro mcnlou trtac dan teh potiacmlnsaih at.crt It otnw cftaef het espellroecraibn arctt hs(Tu eosbmRgr igns in B12 nydiececfi lwli eb pvloesiAt) il ethre of het tactrs era adfeefct ni sdFriiehcr Aataxi +
krewfoo99  rryo.S Jstu kchdece on FA. It lwil losa fetafc the noieperelsalcrb arttc +
spow  eSniantos ot ppnkcrii is DCLM +
meli  OWURDL :DI65 na"ym ttsenipa vpeledo uilonroceg nifsosimtataen deu o:t anoalx enndtaeogier fo eht eraiehpplr ,versne ilndgea to sunembs,n siehe,saaprt nad rseddseep tmoor xsl"fe.eer So, I kinht eth iaetnsosn to ircpiknp swa engrdicbsi het a!raeptieshs +



 +0  upvote downvote
submitted by โˆ—masonkingcobra(408)
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loPrnlseya my ieuss wtih stih qsnoietu si htat I uhtogh 21B aucess ieydliantneom in hbot teh STLC nad eht DLMC DC()S but hyte aer iettgsn teh cmhmieans rehe relyla hwti the lowhe myohtimnealc adci bti adn teh aiemridp myelni ientshssy

fI oeyru' uiorucs

esiwcmsaccs/wrshpt.16twaa:06nd/ctlnt.reuo//2

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 +0  upvote downvote
submitted by โˆ—krewfoo99(116)
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anC nemeoso pexnial wtha teh putceir si oupespds ot ws?ho Is ti pspesuod to eb eetnsdgem ioshnp?uletr

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titanesxvi  sye od ot 12B eycenfiicd +



 +0  upvote downvote
submitted by โˆ—titanesxvi(106)
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Here is a odgo croeurse

syoo/dmmrnk/emeiaewg.duocs:/ponarcoopp/s_mw_h_Istelts.ennwc/wbssldtl

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 -1  upvote downvote
submitted by โˆ—cheeseheadkids(22)
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I enpallysro fele isht tsuieqon si engimsdail eascbeu the ssol fo ppicnikr tsetsaeondrm sosl of the anamcsptilhio a.crtt isTh is TON aptr fo stebuauc oinmbcde nedeteriaong ude ot B12 i.fncdeecyi

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