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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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retoPrios cdro yemosrdn soccru due ot nicrnaofti of eht rporoiset hlaf fo eth salpin ocd,r ofrm ucsnoolic fo eth psetoriro npslai tey.rar rOu ttipena trspnees tihw cerdesdea seintosan ot nkcippir elbwo het lleev fo eht eknse sa ewll as ngalikw itwh a awe-sddbei igat, kyille tdainingci sols of .poorrnitpepoic heT piettna si saol cmaien ithw segyeerpd-hnmet ehlriop.sunt

eHspeenmdrgyet phoinlseurt aer lliaycpyt acuesd yb na aiiiyltnb to ekma egnhuo D,AN cdaesu yb a klca fo enscysare psrcerosru dna vnmsiiat lnidnucig B9 f)(tleao adn 1B2 ano)b.cia(lm If hte etniapt si taeofl cdifieten, ew ees aeedvlet eimoostcenyh .yicdifcene If eth eiaptnt si B12 niefed,ict ew ese etvdeale ameolticmlhyn iadc adn noihseytceom vlsle.e Horisyheptiaoemymnce nac cnsieear iomtso.rhbs bossiohrTm ni eth tospioerr niaslp aetryr nac seuac prroestio ordc nd.myeros In dd,inaoit alck fo nvmiita B12 rmspaii ieymnl tfrooamin and lsdea to cuabSeut Ciemndbo naogeete,rnDi cwihh cfetfsa het lmohipntacSai arctt uin(ncogcat fro sddeereac nkppiicr ,ieasntn)so ipirtnsocCalo tr,Tca and lasDor u-eoniMalmCdl Lismuensc tTrca ouccg(natin for het redcdeu t.prpeorooiicnp

)A rrAeiont rcod mnroys-ed lsos fo romto mnacmo,d as lewl as aretbllia sols fo ateh and pnia, teh iaentpt sha ont lots orotm cunioft,n so it actnon eb .iths )B ratlneC docr yse-ordmn pstersne as a cbamonoiitn fo tmoor and yrossne ,sosl uyaluls iwht dlrebad d.foctiuysnn Thsi apnttei sdoe ton aisyldp tomro loss or berddal .touydinsncf )C oicdmHer nm-rdysoe Alos dalelc uwerrdn-B,aoSq tish si eltepocm iruynj to ihrtee teh tlfe ro irthg side of hte liansp o.dcr tI espnrets ithw roomt unisyocftnd adn lxrfee nfdnoisuytc lleayslritapi at hte lleve fo teh ens;oil osls of reppu ormot camnomd bwleo het ioelns ierllpyastlai (iptassc er;sa)pis slos of ladors icod-cemrlanur aotninses stplayieirlal at nda bweol eht eolsn;i nad slso fo ianp dan rtereampute eanoisnts orallntltcyraae 2 to 3 atrreveb owlbe het esnlio. E) eynegtrmaS dymnsre-o a ncoelaitng uirelfa ot elovdep rtpa fo teh nalips droc. ehT wne noest fo msmstpyo ta 28 rasye old kmaes stih na lynuilke s.dnagis,oi

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yb_26  nzaigm,a khnta yo!u +
aisel1787  egrat naoptnxalei +
rockodude  issennaot ot picrnpik is DCML rttc.a SCD cstffea aonelcbesiprrle (ton o,lchatp)iamsin iiocscr,olntap dna L.DCM oeshwtire odog nptleoxinaa. +4
azibird  esnonStia to icnkppir si ont alrsod cuenllaimdom- lscnimela tatc,r si't citalmnospiha trtac. So shti aettnpi sah a esonil fo teh rdsaol mlsc,oun lahintopcsmia rtcta trnhmpdgyseeee i,puthrnelso dna nmaea.i Whta the lehl is niggo o?n wHo is thsi ustj rpeootisr odrc emndsroy? ampithcnaSiol is ont reispoort do.rc +5
makingstrides  eiLk sotm of teesh ut,nssieqo kpci the lsescto/ best e.swanr Fro nsrseoa va,boe iths is het etbs n.oe +
skonys  A91F g9p6 ssay B12 icnfdciyee sesuac DSC DNA sheapar.sstai hsTi inetpta sah rsiegrseopv ecseds/rnnuaedesmb ipric,pnk xaaita silp(rcreenolaeb & .C)LMD lAos sti' natrpimot to rmeember htat B9 and B21 bhot vhea esbatgmiaolcl eaianm btu B9 SEN'TDO avhe grloaouclien tysmpo.ms +1



 +2  upvote downvote
submitted by โˆ—seagull(1933)
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1B2 yceefcniid laesd ot niliayoednmt of the MLDC dna LSA phasytwa e(..i irrotseop rcdo droemns).y

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 +1  upvote downvote
submitted by โˆ—amarousis(27)
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tuB d'eosnt cesuutba eonbimcd goderanineet deal to trimnampei ni DCL,M eelnlrpbaoescir nad loctocpraisin ?attrc I teg eht acxati igat - noDcebe/erialrlCpMsL. uBt eht onasiestn ot rc,piknip wlndu'ot taht be hte mpsiotanahicl tartc? Thta si otn sluylau dtecaffe ni etscuaub cibmodne t.rgnoeedeain

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krewfoo99  It oludw fecaft the rsaold lonumc tatcr dna teh actaislomhipn ctrta. tI otwn tcfefa the eiclpoenlabrsre cattr (uhTs erRgmsbo sign in 2B1 ceicefniyd illw eb lliiAvtoesp) eehtr fo the astcrt are ftefcaed ni iFisrdcerh xaiaAt +
krewfoo99  yrS.ro stJu dccheke on A.F tI lilw loas etfcaf het eencrbesalilorp rttac +
spow  sontSeina ot irkpinpc is DMLC +
meli  UORWDL 5:DI6 nay"m inptseta epelvod lgneiocuro otntmnieafssia due t:o oaalnx edineregtona fo teh aeiplerhrp versn,e dlngiea ot ,essnnbum p,esaairesth dna rdssdeepe ortmo rel".feexs ,So I tikhn eht tinaoesns ot ipkrcnip asw ibcgsiredn the eaierspta!sh +



 +0  upvote downvote
submitted by โˆ—masonkingcobra(408)
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lPsyeonral ym siues htiw htis euonqsit is atth I hughto 2B1 eassuc temyinndelaio ni thbo het LCTS adn teh LDCM ()DSC utb etyh rea sgintte teh manmceihs rehe ylaelr hwit teh oelwh cntiemlomyha diac tib nad eht dimreiap myenil steinsshy

fI 'euroy uscroiu

ae/6tdc/irwacsrn2tctw.cu:l.tnwsa0/hoemsp1/s6

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 +0  upvote downvote
submitted by โˆ—krewfoo99(115)
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anC oseoenm enlxaip atwh eht rpiucte is epspsdou ot ohsw? Is it uopdessp to be esgntemde reshlp?outin

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titanesxvi  yes od ot 1B2 niyicefedc +



 +0  upvote downvote
submitted by โˆ—titanesxvi(106)
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eeHr is a godo ourcesre

dny/mnsmopetmwed.c/dnassoew_ssleloct_scwair/phmoI:los_pru/wgonk.ebt/

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 -1  upvote downvote
submitted by โˆ—cheeseheadkids(22)
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I napyrloels fele stih tneuqiso is ismignaled eaebucs eht slos of rkinippc tosmsnatdree ssol fo hte iacmansophtli acrt.t ihTs si TNO rapt fo cutbaesu dbeimcno gtainrnodeee due to 1B2 diy.cfeceni

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