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LUMBOSACRAL TRANSITIONAL ANATOMY TYPES AND DISC DEGENERATIVE CHANGES Chabukovska Radulovska Jasminka, 1 Matveeva Niki, 2 Poposka Anastasika 3 1 University Clinic of Surgery “St. Naum Ohridski” Skopje, R Macedonia 2 University “St Cyril and Methodius”, Medical Faculty, Institute of Anatomy, Skopje, R Macedonia 3 University Clinic of Orthopaedics Skopje, R Macedonia Primljen/Received 02. 04. 2014. god. Prihva}en/Accepted 21. 05. 2014. god. Abstract: Background and purpose: The relati- onship between presence of lumbosacral transitional vertebra (LSTV) and disc degenerative changes is un- clear. The aim of the study was to examine the rela- tion between different types of LSTV and disc degene- rative changes at the transitional and the adjacent cep- halad segment. Material and methods: Sixty-three patients (mean age 51.48 ± 13.51) out of 200 adults with low back pain who performed MRI examination of the lumbosacral spine, classified as positive for LSTV, were included in the study. Annular tears, disc degeneration according to Phirmann classification and disc herniations were evaluated and graded at transitional and adjacent cep- halad level. Results: The severity of disc degeneration at the transitional level and the adjacent level correlated with the types of LSTV. Severe disc degenerative changes were most frequent in articulated connection LSTV types and in combined LSTV type at the transitional le- vel and in osseus connection LSTV types at the adja- cent cephalad level. These changes were more frequent in unilateral articulated connection LSTV subtype (64% vs 54%); and in unilateral osseus connection LSTV subtype (25% vs no patients) at transitional le- vel, and in bilateral osseus connection LSTV subtype (100% vs 50%) at the level above. High prevalence of disc herniations was observed in articulated connec- tion LSTV types as well as in unilateral osseus connec- tion LSTV subtype at transitional and the adjacent cep- halad level. At the transitional level higher prevalence of disc herniations was characteristic for unilateral arti- culated connection LSTV subtype (46%vs 41%) and for unilateral osseus connection LSTV subtype (50% vs no patients). At the adjacent level higher prevalence of disc herniations was observed in bilateral articulated connection LSTV subtype (38% vs 27%) and in bilate- ral osseus connection LSTV subtype (50% vs 25%). Conclusions: The compact osseus connection (osseus bridging vs articular bridging) of the lumbo- sacral transitional vertebra with the sacrum protects the disc at the transitional level and produces greater stress to adjacent cephalad segment. Bilateral osseus bridg- ing seems to be most protective to the disc at the transi- tional level, but this type of LSTV produces great stress to the adjacent cephalad level. Key words: lumbosacral anomalies; lumbosacral transitional vertebra; disc degeneration. INTRODUCTION Lumbosacral transitional vertebra (LSTV) are vertebra lying at the juncture of lumbar and sacral spi- nal segments that exhibit characteristics of the neigh- boring vertebral class. These characteristics usually re- gard to the shape and fusion patterns of their transverse processes. Sacralization of L5 occurs when enlarged transverse process (TP) form pseudoarthrosis or fuse unilaterally or bilaterally with the sacrum. Lumbariza- tion of S1 occurs when the transverse process of S1 fa- ils to fuse with the remainder of sacrum. The ante- ro-posterior x-ray of the lumbar spine is the reference standard method to detect LSTV. Coronal and axial imagesin MRI studies on the lumbar spine highlight the transitional lumbosacral anatomy and depict the pseudoarthrosis or osseus fusion of the last lumbar ver- tebra with the sacrum. The most important implication for radiologists is the misnumbering of transitional vertebra, especially when important findings exist at the transitional level, at theadjacent level, or when spi- nal surgery is contemplated. The incidence of this de- velopmental spinal anomaly is between 4 and 30% in UDK: 616.711-007-073 2014; 9(2): 131–136 ID: 208271372 ISSN-1452-662X Originalni nau~ni rad

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LUM BO SAC RAL TRAN SI TI O NAL ANA T OMY TYPESAND DISC DE GE N E R A TI VE CHAN GES

Cha bu kov ska Ra du lov ska Ja smin ka,1 Ma tve e va Ni ki,

2 Po po ska Ana sta si ka

3

1 Uni ver sity Cli nic of Sur gery “St. Na um Ohrid ski” Sko pje, R Ma c e do nia

2 Uni ver sity “St Cyril and Met ho di us”, Me d i cal Fa c ulty, In sti tu te of Ana t omy, Sko pje, R Ma c e do nia

3 Uni ver sity Cli nic of Or t ho pa e dics Sko pje, R Ma c e do nia

Pri mljen/Re ce i ved 02. 04. 2014. god. Pri hva }en/Ac cep ted 21. 05. 2014. god.

Ab stract: Bac k gro und and pur po se: The re la ti -on ship be t we en pre s en ce of lum bo sac ral tran si ti o nalver te bra (LSTV) and disc de ge n e r a ti ve chan ges is un -cle ar. The aim of the study was to ex a m i ne the re la -tion be t we en dif fe r ent types of LSTV and disc de ge n e -r a ti ve chan ges at the tran si ti o nal and the ad ja cent cep -ha lad seg ment.

Ma te rial and met h ods: Sixty-three pa ti ents (meanage 51.48 ± 13.51) out of 200 adults with low back pain who per for med MRI ex a m i na ti on of the lum bo sac ralspi ne, clas si fied as po s i ti ve for LSTV, we re in clu ded in the study. An nu lar te a rs, disc de ge n e r a tion ac cor d ingto Phi r mann clas si fi ca tion and disc her ni a ti ons we reeva l u a ted and gra ded at tran si ti o nal and ad ja cent cep -ha lad le vel.

Re sults: The se ve r ity of disc de ge n e r a tion at thetran si ti o nal le vel and the ad ja cent le vel cor re la ted withthe types of LSTV. Se ve re disc de ge n e r a ti ve chan geswe re most fre qu ent in ar ti c u la ted con nec tion LSTVtypes and in com bi ned LSTV type at the tran si ti o nal le -vel and in os se us con nec tion LSTV types at the ad ja -cent cep ha lad le vel. The se chan ges we re mo re fre qu ent in uni la t e ral ar ti c u la ted con nec tion LSTV sub type(64% vs 54%); and in uni la t e ra l os se us con nec tionLSTV sub type (25% vs no pa ti ents) at tran si ti o nal le -vel, and in bi la t e ral os se us con nec tion LSTV sub type(100% vs 50%) at the le vel abo ve. High pre v a len ce ofdisc her ni a ti ons was ob ser ved in ar ti c u la ted con nec -tion LSTV types as well as in uni la t e ral os se us con nec -tion LSTV sub type at tran si ti o nal and the ad ja cent cep -ha lad le vel. At the tran si ti o nal le vel hig her pre v a len ceof disc her ni a ti ons was cha r ac te r i s tic for uni la t e ral ar ti -c u la ted con nec tion LSTV sub type (46%vs 41%) andfor uni la t e ral os se us con nec tion LSTV sub type (50%vs no pa ti ents). At the ad ja cent le vel hig her pre v a len ceof disc her ni a ti ons was ob ser ved in bi la t e ral ar ti c u la ted

con nec tion LSTV sub type (38% vs 27%) and in bi la t e -ral os se us con nec tion LSTV sub type (50% vs 25%).

Con clu si ons: The com pact os se us con nec tion(os se us brid g ing vs ar ti c u lar brid g ing) of the lum bo -sac ral tran si ti o nal ver te bra with the sa c rum pro tects the disc at the tran si ti o nal le vel and pro du ces gre a ter stress to ad ja cent cep ha lad seg ment. Bi la t e ral os se us brid g -ing se ems to be most pro tec ti ve to the disc at the tran si -ti o nal le vel, but this type of LSTV pro du ces gre atstress to the ad ja cent cep ha lad le vel.

Key words: lum bo sac ral ano m a li es; lum bo sac raltran si ti o nal ver te bra; disc de ge n e r a tion.

IN TRO DUC TION

Lum bo sac ral tran si ti o nal ver te bra (LSTV) arever te bra ly ing at the jun c tu re of lum bar and sa c ral spi -nal seg ments that ex hi bit cha r ac te r i s tics of the ne ig h -bo r ing ver te bral class. The se cha r ac te r i s tics usu ally re -gard to the sha pe and fu sion pat terns of the ir tran s ver se pro ces ses. Sac ra li za tion of L5 oc curs when en lar gedtran s ver se pro cess (TP) form pse u do ar thro sis or fu seuni la t e r ally or bi la t e r ally with the sa c rum. Lum ba ri za -tion of S1 oc curs when the tran s ver se pro cess of S1 fa -ils to fu se with the re ma in der of sa c rum. The an te -ro-po s te ri or x-ray of the lum bar spi ne is the re f e r en cestan dard met hod to de tect LSTV. Co ro nal and ax i alima ge sin MRI stu d i es on the lum bar spi ne hig h lightthe tran si ti o nal lum bo sac ral ana t omy and de pict thepse u do ar thro sis or os se us fu sion of the last lum bar ver -te bra with the sa c rum. The most im por tant im pli ca tionfor ra di o l o gists is the mi s num be r ing of tran si ti o nalver te bra, es pe ci ally when im por tant fin d ings ex ist atthe tran si ti o nal le vel, at the a dja cent le vel, or when spi -nal sur gery is con tem pla ted. The in ci den ce of this de -ve l op men tal spi nal ano m aly is be t we en 4 and 30% in

UDK: 616.711-007-0732014; 9(2): 131–136 ID: 208271372ISSN-1452-662X Originalni nau~ni rad

ge n e ral po p u la tion (1). Con tro ver sial opi n i ons ex ist re -gar d ing to the cli n i cal sig ni f i can ce of this en tity (2, 3).So me au t hors re por ted that a lum bo sac ral tran si ti o nalver te bra is pro tec ti ve for disc de ge n e r a tion at the tran -si ti o nal seg ment, but pro ne to gre a ter disc de ge n e r a -tion at the le vel abo ve (4, 5). Ot her in ve s ti ga tors re por -ted ear li er oc cur ren ce and mo re se ve re de ge n e r a tion insu b jects with LSTV (4, 6). It has been wi dely ac cep tedthat LSTV al ter the bi o mec ha nics of the spi ne and con -tri b u te to low back pain (7, 8, 9).

The aim of the study was to in ve s ti ga te the oc -cur ren ce of LSTV in back pain po p u la tion and to ex a -m i ne the re la tion be t we en dif fe r ent types of LSTV anddisc de ge n e r a ti ve chan ges at tran si ti o nal and ad ja centcep ha lad seg ment. The se is su es can help in un der stan -d ing the na t u ral hi s tory of lum bar spi ne de ge n e r a tionin the pre s en ce of LSTV, which is im por tant for sur ge -ons to ma ke a de ci sion and se lect ap pro pri a te fu sion le -v els or disc re pla ce ment le v els.

MA TE RIAL AND MET H ODS

MRI im a ges of the lum bar spi ne per for med inadults with low back pain over a pe riod of six months(from Sep tem ber 2012 to Fe bru ary2013) we re an a -lyzed. Af ter in sti tu ti o nal re vi ew and bo ard ap pr o val,out of 200 pa ti ents with low back pain (19–83 yearsold), who un der went MR im a g ing of the lum bo sac ralspi ne, 63 we re re t ro spec ti vely se lec ted and in clu ded inthe study. Pa ti ents with kypho sco li o sis, hi s tory of pre -vi o us spi ne sur gery, spi nal frac tu re, ot her con ge n i talspi nal ano m a li es, tu mor or in fec tion we re ex clu dedfrom the study. MR im a g ing ex a m i na ti on of the lum -bo sac ral spi ne was pre for med with 1,5 T MR unit (Sig -na HDI ) with a spi nal sur fa ce coil. The im a g ing pro to -col con si sted of a sa git tal T1-we ig hted fast spin-ec hose qu en ce (FSE) (re p e ti tion ti me msec/ec ho ti me msec,800/14; sec tion thic k ness, 4 mm; fi eld of vi ew, 360 x360 mm; ma trix, 448 x 224), sa git tal T2-we ig hted tur -bo spin-ec ho se qu en ce (3520/102; sec tion thic k ness, 4mm; in ter sec tion gap, 10 mm; ec ho train length of 24),co ro nal T2-we ig hted fast spin-ec ho se qu en ce (FSE) and a tran s ver se T2-we ig hted fast re co v ery fast spin-ec ho(FRF SE) se qu en ce at one or mul ti ple le v els (4,660/120;sec tion thic k ness, 4 mm; in ter sec tion gap, 0.6 mm; ec -ho train length of 27; fi eld of vi ew, 200 x 200 mm; ma -trix 320 x 256). Di ag no s tic im a g ing was per for med bya di ag no s tic ra di o l o gist who was blin ded to the ori g i -nal re ports of the MRI stu d i es in or der to eva l u a te su b -jects with LSTV.

Su b jects with dyspla stic tran s ver se pro cess (he -ight equ al or gre a ter than 19 mm), uni la t e ral or bi la t e -ral, wit h o ut ar ti c u la ted or os se us fu sion be t we en thepro cess and sa c rum we re not in clu ded in the study.The

pa ti ents with LSTV we re di vi ded in three gro ups ba sed on the Ca stel lvi clas si fi ca tion — type II, ar ti c u la tedcon nec tion be t we en TP and sa c rum (N = 46), type III,os se us con nec tion be t we en TP and sa c rum (N = 8),type IV, both os se us and ar ti c u la ted con nec tion be t we -en TP and sa c rum (N = 9). The two types of LSTV (IIand III) we re di vi ded in two sub types ba sed on the uni -la t e ral or bi la t e ral pre s en ce of ar ti c u la ted or os se uscon nec tion. Disc de ge n e r a tion was eva l u a ted and gra -ded us ing the Phi rr mann clas si fi ca tion sys tem in thelast two fully de ve l o ped discs (10). An nu lar te a rs we real so eva l u a ted and the pre s en ce of disc her ni a ti ons was no ti fied and gra ded (1-pro tru si ons, 2-ex tru si ons).

Sta ti s ti cal anal y sis was per for med us ing SPSS(ver sion 20, Chi ca go, IL.USA). A chi squ a re test wasused for sta ti s ti cal com pa r i son be t we en gro ups andsub gro ups for ca t e go r i cal va ri a bles. Kru skal Wal listest was used to com pa re disc de ge n e r a tion Phi r manngra des and disc her ni a ti on sgra des be t we en LSTV gro -ups and sub gro ups. A p va lue less than 0.05 was con si -d e red sta ti s ti cally sig ni f i cant.

RE SULTS

Out of two hun dred su b jects (85 men and 115 wo -men), 63 (31.5%) we re clas si fied as po s i ti ve for tran si -ti o nal lum bo sac ral ver te bra and in clu ded in the study.The ir av e r a ge age was 51.48 years (19–83). The gen -der di s tri bu tion of LSTV po s i ti ve su b jects was 25(40%) men, and 38 (60%) wo men. The eva l u a ted types of tran si ti o nal lum bo sac ral ver te bra we re uni la t e ral en -lar ged TP with pse u do ar thro sis ca t e go ri zed as IIA, in24 (38.1%) su b jects, bi la t e ral en lar ged TP with pse u -do ar thro sis ca t e go ri zed as IIB, in 22 (34.9%) su b jects,en lar ged TP with uni la t e ral com ple te fu sion with thesa c rum ca t e go ri zed as IIIA, in 4 (6.3%) su b jects, bi la t -e ral en lar ged TP with com ple te fu sion al so in 4 (6.3%)su b jects. Mi xed type with pse u do ar thro sis on one si deand com ple te fu sion on the ot her si de was pre s ent in 9(14.3%) su b jects. The most com mon an a to m i cal va ri -ant was the Ca stel lvi type IIA (38.1%), fol lo wed bytype IIB (34.9%), type IV(14.3%) and type IIIA (6.3%) and IIIB (6.3%). Sac ra li za tion was eva l u a ted in 54(86%) pa ti ents and lum ba ri za tion in 9 (14%) pa ti ents.Sta ti s ti cal sig ni f i cant dif fe r en ce for gen der di s tri bu tion by Ca stel lvi clas si fi ca tion gro ups was not ob ser ved(Ta ble1).

Disc de ge n e r a tion

At the tran si ti o nal le vel among the LSTV gro upsdisc de ge n e r a tion was most fre qu ent in pa ti ents withlum bo sac ral tran si ti o nal ver te bra type II (Phi r manngra de 4 and 5 in 63.6% pa ti ents with LSTV type IIA

132 Cha bu kov ska Ra du lov ska Ja smin ka, Ma tve e va Ni ki, Po po ska Ana sta si ka

and 54.2% pa ti ents with LSTV type IIB) and in com bi -ned LSTV type (Phi r mann gra de 4 and 5 in 55.6% pa ti -ents with com bi ned LSTV). Phi r mann gra de 1 and 2was most fre qu ent in pa ti ents with LSTV type IIIB(25% pa ti ents with LSTV type IIIB) (Fi g u re 1). In pa ti -ents with uni la t e ral LSTV sub types (A) of LSTV typeII and III, Phi r mann gra de 4 and 5 was mo re fre qu entthan in pa ti ents with bi la t e ral LSTV sub types (B) (64% pa ti ents with LSTV type IIA vs 54% pa ti ents withLSTV type IIB, 25% of pa ti ents with LSTV type IIIAvs no pa ti ents with LSTV type IIIB).

At the ad ja cent cep ha lad seg ment, lum bo sac raltran si ti o nal ver te bra types with most fre qu ent se ve redisc de ge n e r a ti ve chan ges we re LSTV type III andcom bi ned LSTV type. Phi r mann gra de 4 and 5 wasmost fre qu ent in pa ti ents with LSTV type III andLSTV com bi ned type (100% pa ti ents type IIIB, 50%pa ti ents type IIIA and 55.6% pa ti ents type com bi nedLSTV) (Fi g u re 2). Bi la t e ral os se us con nec tion LSTVsub type IIIB was cha r ac te r i zed with ab sen ce of se ve rede ge n e r a ti ve disc chan ges at the tran si ti o nal le vel, and

ap pe a r an ce of se ve re disc de ge n e r a tion at the ad ja centcep ha lad le vel. In ge n e ral, the re was no sig ni f i cant dif -fe r en ce in disc de ge n e r a tion be t we en dif fe r ent gro upsand sub gro ups of LSTV at tran si ti o nal and the ad ja cent cep ha lad le vel.

An nu lar te a rs

High pre v a len ce of an nu lar te a rs at the tran si ti o nal le vel wit hin the types of LSTV was ob ser ved in LSTVtype III (25% pa ti ents with LSTV type IIIA de m on stra -ted an nu lar te a rs at the tran si ti o nal le vel). Hig her pre v a -len ce of an nu lar te a rs at the tran si ti o nal le vel, al t ho ughnot sig ni f i cant, was ob ser ved in pa ti ents with uni la t e ralar ti c u la ted or os se us fu sion vs bi la t e ral ar ti c u la ted or os -se us fu sion (23% pa ti ents with uni la t e ral LSTV type IIA vs 13% pa ti ents with LSTV type IIB, 25% pa ti ents withuni la t e ral LSTV type IIIA vs no pa ti ents with bi la t e ralLSTV type IIIB). Only 3 pa ti ents de m on stra ted an nu larte a rs at the cep ha lad ad ja cent le vel.

Disc her ni a ti ons

Among the tran si ti o nal lum bo sac ral ver te bra sub -gro ups the gre a t est num ber of disc her ni a ti ons at thetran si ti o nal le vel we re fo und in lum bo sac ral tran si ti o -nal ver te bra type II (46% disc her ni a ti ons in pa ti entswith LSTV type IIA and 41% disc her ni a ti ons in pa ti -ents with LSTV type IIB) (Fi g u re 3). Hig her pre v a len -ce of disc her ni a ti ons was cha r ac te r i s tic for uni la t e ralar ti c u la ted con nec tion LSTV sub type (46% disc her ni -a ti ons for uni la t e ral ar ti c u la ted con nec tion LSTV sub -type vs 41% disc her ni a ti ons for bi la t e ral ar ti c u la tedcon nec tion LSTV sub type) and for uni la t e ral os se uscon nec tion LSTV sub type (50% disc her ni a ti ons for

LUM BO SAC RAL TRAN SI TI O NAL ANA T OMY TYPES AND DISC DE GE N E R A TI VE CHAN GES 133

Ca stel lvitype

N (%) Men Wo men

Type IIA 24 (38,1%) 13 (20,6%) 11 (17,5%)

Type IIB 22 (34,9%) 8 (12,7%) 14 (22,2%)

Type IIIA 4 (6,3%) / 4 (6,3%)

Type IIIB 4 (6,3%) 2 (3,2%) 2 (3,2%)

Type IV 9 (14,3%) 2 (3,2%) 7 (11,1%)

To tal 63 25 38

Ta ble 1. Gen der di s tri bu tion by Ca stel lviclas si fi ca tion gro ups

Fi g u re 1. Disc de ge n e r a tion gra des(Phi r mann gra d ing) at the tran si ti o nal seg ment

in dif fe r ent types of lum bo sac ral tran si ti o nal ver te bra (LSTV Ca stel lvi clas si fi ca tion)

Fi g u re 2. Disc de ge n e r a tion gra des(Phi r mann gra d ing) at the ad ja cent cep ha lad

seg ment in dif fe r ent types of lum bo sac ral tran si ti o nal ver te bra (LSTV Ca stel lvi clas si fi ca tion)

uni la t e ral os se us con nec tion LSTV sub type vs no discher ni a ti ons for bi la t e ral os se us con nec tion LSTV sub -type) at the tran si ti o nal le vel.

The num ber of disc her ni a ti ons at the ad ja centcep ha lad seg ment was lo wer (27% disc her ni a ti ons inpa ti ents with LSTV type IIA and 38% disc her ni a ti onsin pa ti ents with LSTV type IIB). Lar ge disc her ni a ti ons (ex tru si ons) we re most fre qu ently ob ser ved at the ad ja -cent cep ha lad seg ment in pa ti ents with LSTV type II(25.8% ex tru si ons in pa ti ents with LSTV type II). Atthe ad ja cent cep ha lad le vel, hig her pre v a len ce of discher ni a ti ons was ob ser ved in bi la t e ral ar ti c u la ted con -nec tion LSTV sub types (38% vs 27%) and in bi la t e ralos se us con nec tion LSTV sub types (50% disc her ni a ti -

ons for bi la t e ral os se us con nec tion LSTV sub type vs25% disc her ni a ti ons for uni la t e ral os se us con nec tionLSTV sub type) (Fi g u re 4).

DI S CUS SION

The pre v a len ce of LSTV in the li t e r a tu re ran gesbe t we en 4% and 36% (2). Ca stel lvi et al. re por ted a30% pre v a len ce in back pain po p u la tion. The gre a t estnum ber of pa ti ents in the ir study had LSTV type II (3).They fo und a pre v a len ce ra te of 31.5% in back pain po -p u la tion and de ter mi ned the oc cur ren ce ra te for eachsub type of the Ca stel lvi LSTV ra di o grap hic clas si fi ca -tion sys tem. Our study re por ted Ca stel lvi type II as themost com mon type of LSTV. Hug hes and Sa i fud din(11) re por ted LSTV pre v a len ce ra te of 13.4% in 500su bjects of ge n e ral po p u la tion. Se cer et al. (12) pre sen -ted anoc cur ren ce ra te of 4.5% LSTV in young su b jectswith ne u ro lo gic de f i cit and low back pain. Hsi eh et al.(13) re por ted a low pre v a len ce of LSTV of 5.9%, whi leDel port (14) ob ser ved a pre v a len ce ra te of 30%. Apa zi -dis et al. (15) ex a m i ned 211 su b jects and fo und 75 po s i -ti ve for tran si ti o nal lum bo sac ral ver te bra. They usedkid ney-uri nary blad der ra di o graphs and re por ted a pre v -a len ce of 35.6% in the Ame r i can ge n e ral po p u la tion.

The re la ti on ship of LSTV and back pain, disc di s -e a se, ste no sis and ot her de ge n e r a ti ve chan ges has beenwell do c u men ted in symp to m a tic pa ti ents (16). Ourstudy eva l u a ted the re la ti on ship be t we en the spe ci fictypes of lum bo sac ral tran si ti o nal ver te bra and de ge n e r -a tion at the tran si ti o nal le vel and the ad ja cent cep ha ladle vel. Ac cor d ing to our re sults the re was a hig her pre v -a len ce of se ve re disc de ge n e r a ti ve chan ges in the ad ja -cent cep ha lad le vel than at the tran si ti o nal le v els, do m -i nantly in the LSTV types III and IV. The re is a pro tec -ti ve ef fect of the lum bo sac ral tran si tion on the discs atthe tran si ti o nal le v els. This is ev i dent in LSTV type III, whe re the os se us brid g ing at the tran si ti o nal le vel pre -ser ve the discs at this le vel from disc de ge n e r a tion andtran s fer the stress of the spi ne du r ing mo ve ments at thecep ha lad ad ja cent mo bi le le v els. Uni la t e r ally lo ca tedsub types of LSTV at the tran si ti o nal le vel sho wed ahig her pre v a len ce of se ve re disc de ge n e r a ti ve chan gesin our study. Uni la t e r ally lo ca ted sub types of LSTV al -ter the bi o mec ha nics of the spi ne mo re ex pres sed thanbi la t e r ally lo ca ted sub types of LSTV. In ge n e ral, li m i -ted num ber of MRI stu d i es an a lyzed the sub gro ups ofLSTV and the sam ple si zes in the se stu d i es we re usu -ally small (17, 18), al t ho ugh LSTV is a high pre v a lentspi ne con ge n i tal ano m aly es pe ci ally in back pain po p -u la tion. An nu lar te a rs as a sign of early disc de ge n e r a -ti ve chan ges we re pre do m i nantly eva l u a ted at the tran -si ti o nal le vel in uni la t e ral os se us brid g ing LSTV sub -type. Ac cor d ing to the mean age of our sam ple early

134 Cha bu kov ska Ra du lov ska Ja smin ka, Ma tve e va Ni ki, Po po ska Ana sta si ka

Fi g u re 3. Disc her ni a ti ons at the tran si ti o nalseg ment in dif fe r ent types of lum bo sac ral tran si ti o nal

ver te bra (LSTV Ca stel lvi clas si fi ca tion)

Fi g u re 4. Disc her ni a ti ons at the ad ja cent cep ha ladseg ment in dif fe r ent types of lum bo sac ral tran si ti o nal

ver te bra (LSTV Ca stel lvi clas si fi ca tion)

disc de ge n e r a tion in so me in di vi d u als might be ma -sked with age re la ted disc de ge n e r a ti ve chan ges. Hig -her pre v a len ce of disc her ni a ti ons was eva l u a ted at thetran si ti o nal le vel in ar ti c u lar brid g ing LSTV type. Al -so, hig her pre v a len ce of disc her ni a ti ons was cha r ac te -r i s tic for uni la t e ral sub types and com bi ned type ofLSTV, which con firms the the sis of mo re ex ces si vetran s fer of stress on the spi ne mo bi le seg ments in uni la -t e r ally and com bi ned types of LSTV. Disc her ni a ti onswe re less fre qu ent fin d ings at cep ha lad ad ja cent seg -ments, al t ho ugh high pre v a len ce of lar ge ex tru si onswas no ti fied at cep ha lad ad ja cent seg ments in pa ti entswith ar ti c u lar brid g ing LSTV type.

A li m i ta tion of our study might be that the ex a m i -ned sam ple do not re p re sent asymp to m a tic po p u la tion.Ho w e ver, it has been ac cep ted that LSTV con tri b u te tolow back pain (7, 8). Pre vi o usly pu b lis hed stu d i es ha ve al so re por ted in ter re a der agre e ment us ing Phi r mannclas si fi ca ti o nof disc de ge n e r a tion (10).

CON CLU SION

Com pact os se us con nec tion (os se us brid g ing vsar ti c u lar brid g ing) of the lum bo scral tran si ti o nal ver te -bra to the sa c rum pro tects the disc at the tran si ti o nal le -vel and pro du ces gre a ter stress to ad ja cent cep ha ladseg ment. Bi la t e ral os se us brid g ing se ems to be mostpro tec ti ve to the disc at the tran si ti o nal le vel, al t ho ughthis type of LSTV pro du ces gre a ter stress to the ad ja -cent cep ha lad le vel. Uni la t e ral or asym me t ric ar ti c u la -ted or os se us con nec tion of the lum bo scral tran si ti o nalver te bra to the sa c rum pro du ces gre a ter stress to thedisc at the tran si ti o nal le vel com pa red to the bi la t e ralor sym me t ric ar ti c u la ted an d os se us con nec tion.

Ab bre vi a ti ons

LSTV — lum bo sac ral tran si ti o nal ver te braTP — tran s ver se pro cess

LUM BO SAC RAL TRAN SI TI O NAL ANA T OMY TYPES AND DISC DE GE N E R A TI VE CHAN GES 135

Sa ̀ e tak

LUM BO SA KRAL NI TRAN ZI CI O NI ANA TOM SKI TI PO VI

I DE GE NE RA TIV NE PRO ME NE DI SKACha bu kov ska Ra du lov ska Ja smin ka,

1 Ma tve e va Ni ki,

2 Po po ska Ana sta si ka

3

1 Uni ver sity Cli nic of Sur gery “St. Na um Ohrid ski” Sko pje, R Ma c e do nia

2 Uni ver sity “St Cyril and Met ho di us”, Me d i cal Fa c ulty, In sti tu te of Ana t omy, Sko pje, R Ma c e do nia

3 Uni ver sity Cli nic of Or t ho pa e dics Sko pje, R Ma c e do nia

Uvod i cilj: Od nos iz me |u pri su stva pre la znoglum bo sa kral nog pr {lje na (LSTV) i de ge ne ra tiv nih pro -me na di ska je ne ja san. Cilj ove stu di je je da is pi ta od -nos iz me |u raz li ~i tih ti po va LSTV i de ge ne ra tiv nihpro me na di ska u pre la znom i su sed nom prok si mal nomseg men tu.

Ma te ri jal i me to de: 63 pa ci jen ta (pro se~ ne go di -ne sta ro sti 51,48 ± 13,51) od 200 od ra slih sa bo lom udo njem de lu le |a ko ji su pod vrg nu ti MRI pre gle dulum bo sa kral ne ki~ me, i kod ko jih je na |en po zi ti vanLSTV, uklju ~e ni su u stu di ju. Ras ce pi pr ste na, de ge ne -ra ci ja di ska pre ma Phir man no voj kla si fi ka ci ji i her ni -ja ci je di ska su eva lu i ra ni i gra di ra ni na pre la zni i su -sed ni prok si mal ni ni vo.

Re zul ta ti: Te ̀ i na de ge ne ra ci je di ska u pre la znom i su sed nom prok si mal nom ni vou ko re li ra sa ti pomLSTV. Te {ke de ge ne ra tiv ne pro me ne di ska su ~e {}ekod zglob no po ve zu ju }ih i me {o vi tih LSTV ti po va upre la znom ni vou, i kod kost no po ve zu ju }ih LSTV ti -po va u su sed nom vi {em ni vou. Ove pro me ne su bi le~e {}e kod jed no stra nog zglob no po ve zu ju }eg LSTV

sub ti pa (64% vs 54%); kod jed no stra nog kost no po ve -zu ju }eg LSTV sub ti pa (25% vs ni je dan pa ci jent) u pre -la znom ni vou, i kod bi la te ral nog kost no po ve zu ju }egLSTV sub ti pa (100% vs 50%) na su sed nom vi {em ni -vou. Vi so ka pre va len ca her ni ja ci je di ska je na |e na kod jed no stra nih zglob no po ve zu ju }ih LSTV ti po va, kao ikod jed no stra nih kost no po ve zu ju }ih LSTV ti po va upre la znom ni vou i su sed nom prok si mal nom ni vou. Nasu sed nom vi {em ni vou ve }a pre v a len ce her ni ja ci je di -ska je na |e na kod bi la te ral nog zglob no po ve zu ju }egLSTV sub ti pa (38% vs 27%) i bi la te ral nog kost no po -ve zu ju }eg LSTV sub ti pa (50% vs 25%).

Za klju ~ak: Kom pakt na me |u kost na ve za lum bo -sa kral nog pre la znog pr {lje na sa sa kru mom {ti ti disk napre la znom ni vou i iza zi va ve }i stres na su sed nom prok -si mal nom ni vou. Bi la te ral no kost no pre mo {}a va nje iz -gle da da pru ̀ a ve }u za {ti tu di ska na pre la znom ni vou,ali ovaj tip LSTV stva ra ve }i stres na su sed nom vi {emni vou.

Klju~ ne re ~i: lum bo sa kral ne ano ma li je; lum bo -sa kral ni pre la zni pr {lje no vi; de ge ne ra ci ja di ska.

RE F E R EN CES

1. Ko nin GP, Walz DM. Lum bo sac ral tran si ti o nal ver te -brae: clas si fi ca tion, im a g ing fin d ings, and cli n i cal re l e van ce.AJ NR Am J Ne u ro ra diol. 2010; 31(10): 1778–86.

2. Bron JL, van Royen BJ, Wu i sman PI. The cli n i cal sig ni -f i can ce of lum bo sac ral tran si ti o nal ano m a li es. Ac ta Ort hopBelg. 2007; 73(6): 687–95.

3. Ca stel lvi AE, Gold stein LA, Chan DP. Lum bo sac raltran si ti o nal ver te bra and the ir re la ti on ship with lum bar ex tra du -ral de fects. Spine (Philla Pa 1976). 1984;9(5):493–5.

4. Luoma K, Vehmas T,Raininko R, Luukkonen R, Riihi-mäki H. Lumbosacral tran si tional ver te bra: re la tion to disc de -gen er a tion and low back pain. Spine (Philla Pa 1976). 2004;29(2):200–5.

5. Aihara T, Takahashi K, Ogasawara A, Itadera E, Ono Y,Moriya H. Intervertebral disc de ge n e r a tion as so ci a ted with lum -bo sac ral tran si ti o nal ver te brae: a cli n i cal and an a to m i cal study. J Bo ne Jo int Surg Br. 2005; 87(5): 687–91.

6. Qu in lan JF, Du ke D, Eusta ce S. Bertolotti’s syn drome.A cause of back pain in young peo ple. J Bo ne Jo int Surg Br.2006; 88(9): 1183–6.

7. Bra ult JS, Smith J, Cur ri er BL. Par tial lum bo sac ral tran -si ti o nal ver te bra re sec tion for con tra la te ral fa ce to ge nic pain. Spine(Philla Pa 1976); 26(2): 226–9.

8. Nar do L, Ali zai H, Vi rayava nich W, et al. Lum bo sac raltran si ti o nal ver te brae: as so ci a tion with low back pain. Ra di o l -ogy. 2012; 265(2): 497–503.

9. Al bert HB, Briggs AM, Kent P, Byrhagen A, Hansen C,Kjaergaard K. 1. The prev a lence of MRI-de fined spi nal patho-anat o mies and their as so ci a tion with modic changes in in di vid u -

als seek ing care for low back pain. Eur Spine J. 2011; 20(8):1335–62.

10. Pfirrmann CW, Metzdorf A, ZanettiM, Hodler J, BoosN. Mag netic res o nance clas si fi ca tion of lum bar in ter ver te braldisc de ge n e r a tion. Spi ne. 2001; 26(17): 1873–8.

11. Hug hes RJ, Sa i fud din A. Num be r ing of lum bo sac raltran si ti o nal ver te brae on MRI: ro le of the ili o lum bar li g a ments.AJR Am J Ro ent ge nol. 2006; 187(1): W59–65.

12. Se cer M, Mu ra dov JM, Dal gic A. Eva l u a tion of con ge n -i tal lum bo sac ral mal for ma ti ons and ne u ro lo g i cal fin d ings in pa ti -ents with low back pain. Turk Ne u ro surg.2009; 19(2): 145–8.

13. Hsi eh CY, Van der ford JD, Mo re au SR, Prong T. Lum bo -sac ral tran si ti o nal seg ments: clas si fi ca tion, pre v a len ce, and ef fecton disc he ight. J Ma ni p u la ti ve Physi ol T her. 2000; 23(7): 483–9.

14. Delport EG, Cucuzzella TR, Kim N, Marley J, PruittC, Delport AG. Lumbosacral tran si ti o nal ver te bra: in ci den ce ina con se c u ti ve pa ti ent se ri es. Pain Phy si cian. 2006; 9(1): 53–6.

15. Apazidis A, Ricart PA, Diefenbach PC, Spivak JM.The prev a lence of tran si tional ver te brae in the lum bar spine.Spine J. 2011; 11(9): 858–62.

16. Ko nin GP, Walz DM. Lum bo sac ral tran si ti o nal ver te -brae: clas si fi ca tion, im a g ing fin d ings, and cli n i cal re l e van ce.AJ NR Am J Ne u ro ra diol. 2010; 31(10): 1778–86.

17. Qu in lan JF, Du ke D, Eusta ce S. Ber to lot ti’s syn dro me:a ca u se of back pain in young pe o ple. J Bo ne Jo int Surg Br.2006; 88(9): 1183–6.

18. Taskaynatan MA, Izci Y, Ozgul A, Hazneci B, DursunH, Kalyon TA. Clin i cal sig nif i cance of con gen i tal lumbosacralmal for ma tions in young male pop u la tion with pro longed lowback pain. Spine (Philla Pa 1976). 2005; 30(8):E210–3.

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