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Anaemia and fever in kidney transplant. The role of human parvovirus B19

Parodis López, Y.,Santana Estupiñán, R.,Marrero Robayna, S.,Gallego Sampera, R.,Henríquez Palop, F.,Rivero Vera, J.C.,Camacho Galán, R.,Pena López, M.J.,Sablón González, Nery,González Cabrera, F.,Oliva Dámaso, Elena,Vega Díaz, Nicanor,Rodríguez Pérez, Jo

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n e o l o g i a. 2 0 1 7;3 7(2):206–212 Re is a de la Sociedad Española de Ne ología w w w. e is ane ologia.com Case epo Anaemia and e e in kidney ansplan . The ole o human pa o i us B19夽 Yane Pa odis Lópeza, Raquel San ana Es upi ˜ nána, Sil ia Ma e o Robaynaa, Robe o Gallego Sampe a, Fe nando Hen íquez Palopa, José Ca los Ri e o Ve a b, Ra ael Camacho Galánb, Ma ía José Pena Lópezc, Ne y Sablón Gonzáleza, Fayna González Cab e aa, Elena Oli a Dámasoa, Nicano Vega Díaza, José Ca los Rod íguez Pé eza,∗ aSe icio de Ne ología, Hospi al Uni e si a io de G an Cana ia D . Neg ín, Uni e sidad de Las Palmas de G an Cana ia, Las Palmas de G an Cana ia, Spain bSe icio de Ana omía Pa ológica, Hospi al Uni e si a io de G an Cana ia D . Neg ín, Uni e sidad de Las Palmas de G an Cana ia, Las Palmas de G an Cana ia, Spain cSe icio de Mic obiología, Hospi al Uni e si a io de G an Cana ia D . Neg ín, Uni e sidad de Las Palmas de G an Cana ia, Las Palmas de G an Cana ia, Spain a i c l e i n o A icle his o y: Recei ed 26 Decembe 2015 Accep ed 25 Augus 2016 A ailable online 24 Ap il 2017 Keywo ds: Renal ansplan Human pa o i us B19 Pos - ansplan anaemia a b s a c In ec ions emain an issue o pa icula ele ance in enal ansplan pa ien s, pa icula ly i al in ec ions. Human pa o i us B19 in ec ion causes se e e e ac o y anaemia, pancy openia and h ombo ic mic oangiopa hy. I s p esence is ecognised by analysing blood polyme ase chain eac ion (PCR) and by he disco e y o ypical gian p oe y h oblas s in he bone ma ow. We epo he case o a 65 yea -old man wi h a his o y o deceased dono enal ansplan in Sep embe 2014. A 38 days a e he ansplan , he pa ien p esen ed p og essi e anaemia ha was esis an o e y h opoiesis-s imula ing agen s. A 64 days a e ansplan , hype - he mia occu ed wi h p og essi e de e io a ion o he pa ien ’s gene al condi ion. The i al se ology and he fi s blood PCR o human pa o i us B19 we e bo h nega i e. A 4 mon hs and 19 days a e , a bone ma ow biopsy was conduc ed, showing gian e y h oblas s wi h nuclea i al inclusions ha we e compa ible wi h pa o i us; a PCR in he issue confi med 夽Please ci e his a icle as: Pa odis López Y, San ana Es upi˜ nán R, Ma e o Robayna S, Gallego Sampe R, Hen íquez Palop F, Ri e o Ve a JC, e al. Anemia y fieb e en el pos asplan e enal: su elación con el pa o i us humano B19. Ne ologia. 2017;37:206–212. ∗Co esponding au ho . E-mail add ess: j odpe [email p o ec ed] (J.C. Rod íguez Pé ez). 2013-2514/© 2016 Sociedad Espa˜ nola de Ne olog´ ıa. Published by Else ie Espa˜ na, S.L.U. This is an open access a icle unde he CC BY-NC-ND license (h p://c ea i ecommons.o g/licenses/by-nc-nd/4.0/). n e o l o g i a. 2 0 1 7;3 7(2):206–212 207 he diagnosis. A second blood PCR was posi i e o pa o i us. A e ea men wi h in a- enous immunoglobulin and he empo a y discon inua ion o mycophenola e mo e il, a comple e emission o he disease occu ed, al hough he blood PCR o pa o i us B19 emained posi i e, so moni o ing is necessa y o u u e likely ecu ence. © 2016 Sociedad Espa˜ nola de Ne olog´ ıa. Published by Else ie Espa˜ na, S.L.U. This is an open access a icle unde he CC BY-NC-ND license (h p://c ea i ecommons.o g/licenses/ by-nc-nd/4.0/). Anemia y fieb e en el pos asplan e enal: su elación con el pa o i us humano B19 Palab as cla e: T asplan e enal Pa o i us B19 humano Anemia pos asplan e e s u m e n Las in ecciones con inúan siendo un p oblema ele an e en el pacien e asplan ado enal, en especial las in ecciones i ales. La in ección po el pa o i us humano B19 causa anemia e ac a ia g a e, panci openia y mic oangiopa ía ombó ica. Dicha in ección se diagnos ica median e el análisis de la eacción en cadena de la polime asa (PCR) en sang e y po la p esencia de p oe i oblas os gigan es ípicos en la médula ósea. P esen amos el caso clínico de un a ón de 65 a˜ nos con asplan e enal de donan e cadá e en sep iemb e de 2014. A los 38 días del asplan e comienza con anemia p og esi a y esis en e a los agen es es imulan es de la e i opoyesis. A los 64 días se p oduce hipe e - mia, con de e io o p og esi o de su es ado gene al. La se ología í ica esul ó nega i a, al igual que la PCR inicial en sang e del pa o i us humano B19. A los 4 meses y 19 días se eal- iza una biopsia de médula ósea en la que se obse an e i oblas os gigan es con inclusiones í icas nuclea es compa ibles con pa o i us, po lo que se ealiza una PCR en dicho ejido que confi ma el diagnós ico. Una segunda PCR en sang e esul ó posi i a. T as el a amien o con inmunoglobulinas in a enosas (IGIV) y la suspensión empo al del mico enola o de mo e ilo, se p oduce una emisión comple a de la en e medad, aunque pe sis ía posi i a la PCR pa a el pa o i us B19 en sang e, lo que hace necesa io igila p obables ecidi as. © 2016 Sociedad Espa˜ nola de Ne olog´ ıa. Publicado po Else ie Espa˜ na, S.L.U. Es e es un a ´ ıculo Open Access bajo la licencia CC BY-NC-ND (h p://c ea i ecommons.o g/licenses/ by-nc-nd/4.0/). In oduc ion Fac o s in ol ed in he de elopmen o pos - ansplan anaemia a e: blood loss, i on and ola e deficiency, low e y h opoie in, and also hype pa a hy oidism, neoplasms, angio ensin-con e ing enzyme inhibi o s, and angio ensin II ecep o blocke s, immunosupp essi e d ugs, alganciclo i , co- imoxazole, and ch onic g a dys unc ion1in ec ions caused by cy omegalo i us (CMV), Eps ein–Ba i us (EBV) and pa o i us B19, which can p oduce bone ma ow aplasia.1,2 Pa o i us B19 in ec ion a ec s 40–60% o he gene al pop- ula ion, and i s highes incidence is in school age child en (“fi h disease”). In kidney ansplan s, pa o i us B19 in ec ion is a a e complica ion. Molecula biology echniques ha e shown i al DNA in he blood o 20–30% o ansplan pa ien s.3Se e al au ho s ha e epo ed ha he incidence o his i us in solid o gan ansplan s is 2%.4Howe e , he exac incidence o in ec ion in kidney ansplan s is no known, al hough i has been epo ed up o 12%.5 In heal hy subjec s wi h no ansplan , pa o i us B19 is ansmi ed h ough espi a o y sec e ions, blood and u ine,6 and ac oss he placen a o he oe us.5In kidney ansplan pa ien s, o he possibili ies a e seconda y i al eac i a ion due o se e e immunosupp ession, ansmission h ough blood ans usions, o e en dono -de i ed pa hways.5,7 The symp oms o pa o i us B19 in ec ion include e e , a h algia and ash. O he clinical changes include a h opa- hy, ansien aplas ic c isis, hyd ops e alis, abo ion and oe al dea h; i has also been associa ed wi h asculi is, pe iphe al neu opa hy, myoca di is, ulminan li e ailu e and Nezelo synd ome.8In kidney ansplan pa ien s, he main sign is he p esence o acu e o ch onic aplas ic anaemia.1 He e we p esen a sho e iew accompanied by a case epo o a kidney ansplan pa ien who had anaemia e ac- o y o e y h opoiesis-s imula ing agen s gi en du ing he fi s ew mon hs a e ansplan a ion. Fe e and gene al malaise subsequen ly appea ed, and bo h he se ological and poly- me ase chain eac ion (PCR) es s o pa o i us B19 we e nega i e. Case epo We p esen he case o a 65-yea -old man wi h a his o y o hype ension due o p ima y hype aldos e onism and ch onic kidney disease since 1999, wi h neph o ic- ange p o einu ia 208 n e o l o g i a. 2 0 1 7;3 7(2):206–212 due o ch onic glome uloneph i is (no kidney biopsy). He was on haemodialysis since May 2012 un il 30/09/2014, when a cada e ic kidney ansplan wi h 6 incompa ibili ies was pe - o med. The dono biopsy, wi h 41 glome uli, showed ha 7.3% we e scle o ic glome uli, sligh hyaline hickening, less han 25% ubula a ophy and less han 5% in e s i ial fib o- sis. Induc ion immunosupp essi e ea men was gi en wi h basiliximab, ac olimus, mycophenola e mo e il (MMF) and s e oids. In he immedia e pos - ansplan pe iod, he pa ien had e ec i e diu esis wi h no need o dialysis. In e ms o complica ions, he de eloped pos - ansplan diabe es melli us and haema oma om he su gical bed wi h de el- opmen o anaemia equi ing ans usion o 5 packed ed blood cells. A discha ge, he ollowing alues we e obse ed: plasma c ea inine (pC ): 1.56 mg/dl; haemoglobin (Hb): 8.2 g/dl; haema oc i : 25.5%; leukocy es: 11,300/␮l; pla ele s: 291,000/␮l. His immunosupp essi e ea men consis ed o p ednisone 25 mg/day, ac olimus 5.5 mg/day and MMF 2 g/day. He was also p esc ibed alganciclo i and ime hop im-sul ame hoxazole as p ophylaxis. The pa ien p og essed wi hou symp oms, wi h a educ ion in pC o 1.2 mg/dl in he fi s 15 days a e he ansplan . His Hb was a ound 8–9 g/dl, wi h a p og essi e inc ease in e y h opoie in equi emen s and fluc ua ing lymphopenia, bu wi h no o he haema ological abno mali ies. Due o p o einu ia o up o 1.2 g/day, wi h no impai men in enal unc ion, a g a biopsy was pe o med, his was fi y six days a e he ansplan (No /2014),. The findings we e compa ible wi h mild ubula oxici y caused by an ical- cineu inics, segmen al scle osis o one glome ulus, in e s i ial fib osis wi h mild ubula a ophy wi hou inflamma ion, as well as he p esence o isola ed lymphocy es in he a e ial in ima. Immunofluo escence e ealed mild-mode a e IgM and C3 posi i i y and he C4d s aining was nega i e. The pa ien was asymp oma ic wi hou impai men o enal unc ion (pC : 1–1.2 mg/dl), wi h op imal immunosupp ession le els, 0% an i-HLA class I and II an ibodies, wi h no changes on he ul asound and nega i e i ological es s (CMV/BK). I was decided o main ain close moni o ing, and a p og essi e educ ion in u ine p o ein was obse ed. Six y ou days a e he ansplan (Decembe 2014), he pa ien had hype he mia, no ocal defici and a poo gene al condi ion, wi h as henia, hypo exia,weigh loss, wi h a educ- ion o haemoglobin o 7.1 g/dl and a haema oc i o 20.6%, o which he was hospi alised. The addi ional es s showed no leukopenia o h ombocy openia; no mal p ocalci onin le - els (0.15 ng/ml) and ele a ed LDH (321–397 U/l) and C- eac i e p o ein (7.17 mg/l); o al p o eins: 5.7 g/dl; ele a ed o al bili u- bin (1.62 mg/dl) wi h indi ec bili ubin o 0.98 mg/dl; ele a ed e i in (1528.60 ng/ml); Na 130 mEq/l, Mg 1.02 mg/dl and K 3.4 mEq/l, in he con ex o his p ima y hype aldos e onism. As a as enal unc ion, plasma c ea inine did no exceed 1.05 mg/dl. Du ing his fi s admission, he comple e se ology o he ollowing pa hogens was nega i e: EBV, CMV, he pes i us, hepa o opic i us, ubella, a icella-zos e , pa o i us B19, Mycoplasma pneumoniae, Coxiella bu ne ii, Ricke sia yphi, Ba - onella henselae, Toxoplasma gondii, leishmania, mycobac e ia and ungi; as well as he blood PCR o pa o i us B19 and CMV. He had e e only he fi s day o admission, and he ea e he pa ien emained a eb ile. He was ea ed wi h quinolones and hi d-gene a ion cephalospo ins, which we e discon inued a discha ge. No mocy ic, no moch omic and hypo egene a i e anaemia wi h i on o e load was a ibu ed o he blood ans usions and d ug oxici y ( alganciclo i and ime hop im-sul ame hoxazole), which was decided o be discon inued. A discha ge, a se ology sugges ed acu e Q e e wi h pos- i i e IgM an ibodies on he indi ec immunofluo escence (IIF) es o Coxiella bu ne ii, o which ea men wi h doxycycline was s a ed o 10 days. As he e e and anaemia las ed 4 mon hs a e he ansplan , i was decided o admi him o hospi al in o de o ule ou ch onic Q e e . Du ing his second admission, ches X- ay, abdominal ul asound, abdominal CT, PET-CT, echoca diog am, gas- oscopy and colonoscopy we e no mal. The umou al ma ke s and se ology es s (including new an ibody assay [IIF] o pa o i us B19 and Coxiella bu ne ii), as well as cul u es o ube culosis and i uses (HSV-1, HSV-2, VZV, CMV, EBV, VHH- 6, VHH-7, VHH-8 and en e o i us RNA), we e nega i e in all cases. The e o e, he diagnosis o Q e e as he o igin o he clinical symp oms was uled ou . I was conside ed a alse pos- i i e, as he e was no se ocon e sion in he second sample and he e e pe sis ed despi e ea men . 8.48.0 9.08.5 7.78.09.2 11.5 14.3 16.5 5 7.5 10 12.5 15 17.5 20/02 23/02 26/02 28/02 02/03 06/03 09/03 16/03 31/03 05/05 Flebogamma Fig. 1 – Changes in haemoglobin alues (g/dl). n e o l o g i a. 2 0 1 7;3 7(2):206–212 209 0.7 0,7 0.9861 0.4 0.6 1.01.3 1.6 1.4 1.3 0 1 2 3 20/02 23/02 26/02 28/02 02/03 06/03 09/03 16/03 31/03 05/05 Flebogamma Fig. 2 – Changes in lymphocy e alues (10×3/␮l). 2.1 3.6 2.5 3.9 5.1 2.9 6.6 6.3 6.9 6.66.7 0 2.5 5 7.5 18/02 20/02 23/02 26/02 28/02 02/03 06/03 09/03 16/03 31/03 05/05 Flebogamma Fig. 3 – Changes in leukocy es (10×3/␮l). The pa ien emained wi h e e wi h a ma ked de e i- o a ion in his gene al condi ion, anaemia and lymphopenia (Figs. 1–3); i was he e o e decided o pe o m a bone ma ow biopsy on Feb ua y/2015, in which hypocellula bone ma ow was obse ed wi h a ma ked dec ease o he e y h oid se ies and wi h gian e y h oblas s, wi h sca ce eosinophilic nuclea inclusions ha de e mined an inc ease in cell size. All o his was sugges i e o pa o i us B19 in ec ion (Figs. 4 and 5), which was confi med by PCR wi h a posi i e esul in he is- sue specimen o he biopsy. Simul aneously, i was decided o pe o m a new blood PCR es o pa o i us B19, which his ime was posi i e. A e he confi ma ion o pa o i us B19 in ec ion, he MMF was discon inued, and ea men wi h a daily IV immunoglob- ulin 0.5 g/kg/dose (10 doses) was s a ed, wi h adequa e ole ance, disappea ance o e e , and no malisa ion o Hb and WBC se ies, a e which he was discha ged in Ma ch 2015. A he end o he ea men , wi h s able Hb and a eb ile, i was decided o esume he MMF a low doses. Howe e , 6 mon hs a e discha ge, he e was a sligh impai men o enal unc ion: pC up o 1.55 mg/dl and u ine p o ein o 2.1 g/24 h (p e ious 0.6–0.8 g/24 h). In conside ing ha i could be due o he educed immunosupp ession a second kid- ney biopsy was pe o med in No embe 2015, which e ealed mild enal ubuli is indica i e o bo de line acu e ejec ion, in e s i ial fib osis, mode a e ubula a ophy, and a eas o isome ic acuola ion. The e we e inflamma o y cells in he a e y wall he e we e, mos o which we e in apa ie al and a ew, subendo helial. C4d s aining and immunofluo escence we e nega i e. Fig. 4 – Image o bone ma ow showing imma u e e y h oid cells wi h signs o pa o i us B19 in ec ion (haema oxylin and eosin; 100x). 210 n e o l o g i a. 2 0 1 7;3 7(2):206–212 Fig. 5 – Image o bone ma ow showing p oe y h oblas wi h nuclea i al inclusion cha ac e is ic o pa o i us B19 in ec ion (haema oxylin and eosin; 400x). The pa o i us i al load was s abilised, so he immuno- supp ession was op imised by inc easing he MMF dose om 500 o 750 mg/24 h and wi h a ac olimus dose able o main ain le els a ound 7–8 ng/dl, a e which he e was a educ ion in u ine p o ein and a s abilisa ion o enal unc ion, wi h plasma C o 1.48–1.55 mg/dl. The possibili y o adminis e ing an i- ejec ion he apy was no conside ed since i could lead o an inc ease in he eplica ion o pa o i us B19.9 A yea a e he end o ea men , he pa ien emained a eb ile, wi h inc eased appe i e and weigh gain. Wi h ega d o he lab esul s, he pa ien had Hb le els o 15.2 g/dl, wi h no need o e y h opoie in, s able enal unc ion, and wi h u ine p o ein o less han 1 g/day (con olled wi h dual RAAS blockade). An i-HLA class I and II an ibodies emained nega i e. As o plasma PCR o pa o i us B19, ou hospi al’s labo a- o y alida ed he quan i a i e me hod o pa o i us B19. We did no ha e he i al load a ailable a he ime o diagnosis, and he fi s quan i a i e measu emen was done in Sep em- be 2015 (app oxima ely 7 mon hs a e he end o ea men ), wi h <50 copies/ml. We in e ed ha , al hough we we e no able o comple ely elimina e he i us, he p e- ea men i al load was p obably much la ge , gi en he clinical and lab- alue imp o emen obse ed. The cu en i al load emains below 100 copies/ml, and clinical and lab pa ame e s a e being mon- i o ed, including pe iodic PCR measu emen s so a elapse can be de ec ed. Discussion Vi al in ec ions p edomina e in he fi s yea a e ansplan , when immunosupp ession is a maximum.10 Pa o i us in ec- ion in he ansplan ed popula ion is a e, and he symp oms may be sub le: anaemia is he main mani es a ion.11 Ou pa ien was diagnosed wi h pa o i us B19 in ec- ion 142 days a e ansplan a ion. Anaemia was he ini ial finding, which subsequen ly wo sened; he e was also hype - he mia, wi h a p og essi e de e io a ion in his gene al s a e, as henia, hypo exia and weigh loss. The pa o i us in ec ion could ha e been ansmi ed om he dono , bu he e was no se ology o i al load a ail- able; he e o e we canno confi m ansmission by his ou e. Ano he possible sou ce o in ec ion migh ha e been blood ans usions du ing he immedia e pos - ansplan pe iod. I could be a eac i a ion o he i us in he ecep o caused by immunosupp ession, since we did no ha e he ecipien ’s p e- ansplan se ology. Conside ing ha a he ime o diagnosis he e was an epidemic o pa o i us B19 in he popula ion, we suspec ha ou pa ien may ha e acqui ed he in ec ion du ing his epidemiological ou b eak. The eason o anaemia Pa o i us B19 p oduces lysis o p oe y h oblas (e y h oid p ogeni o cell).8,9 The in ec ion o his cell occu s h ough he P an igen (globoside Gb4), a ecep o p esen in e y h oid cells and in o he s, including endo helial cells, pla ele s, syn- o iocy es, smoo h muscle cells and oe al myocy es. The i us need he P an igen o bind o he cell bu i is also equi ed he p esence o a co- ecep o (␣5␤1) o he in ec ion o be suc- cess ul and o ac as an in eg in. E y h oid cells con ain la ge amoun o bo h molecules on hei su ace.9 Anaemia may be no mocy ic, se e e no moch omic, o wi h poo e iculocy e esponse which does no espond o blood ans usions o e y h opoiesis-s imula ing agen s.4 Leukopenia, h ombocy openia, and eac i e haemophago- cy ic synd ome ha e also been associa ed o pa o i us B19 in ec ion.12 In ou pa ien , no mocy ic and no moch omic anaemia was he main mani es a ion du ing he clinical cou se, wi h Hb alues as low as o 6.7 g/dl, wi h no esponse o e y h opoiesis-s imula ing agen s, so he had o ecei e se e al ans usions. Diagnosis The diagnosis o pa o i us B19 in ec ion is made based on he p esence o pe sis en anaemia, usually e iculocy openia, wi h gian p oe y h oblas s wi h p ominen eosinophilic i al inclusions in he bone ma ow, an i-pa o i us se um IgM/IgG and an i-DNA posi i e pa o i us PCR.13 In kidney ansplan pa ien s, he main sign is he p esence o acu e o ch onic aplas ic anaemia.1In a s udy o 98 pa ien s, he main clinical mani es a ions associa ed wi h pa o i us B19 in ec ion we e anaemia wi h associa ed dyspnoea and as henia in 98% o cases, and e e in 54.9%.14 The li e a u e on he ela ionship be ween ch onic g a dys unc ion and ac i e pa o i us B19 in ec ion is no consis en . Some au ho s7,15 confi m his ela ionship, whe eas o he s do no .5 The se ological es ing needed o make he diagnosis o acu e pa o i us B19 in ec ion (IgM) has a sensi i i y and specifici y o 89% and 99%, espec i ely, in immuno- compe en pa ien s. This ac has no been confi med in ansplan pa ien s because o hei immunosupp ession; in hese pa ien s he mos eliable me hod is pe iphe al blood o bone ma ow PCR. The choice o diagnos ic es o PCR o pa o i us B19 is impo an so alse nega i es a e a oided. Some me hods a e sensi i e o geno ype 1, bu no sui able o de ec ing n e o l o g i a. 2 0 1 7;3 7(2):206–212 211 geno ypes 2 o 3. The e o e i is necessa y o ha e me hods able o de ec he 3 geno ypes. Inhibi o s in blood samples may also cause alse nega- i es. Tes ing o in e nal inhibi o s should be included when analysing he samples, o be ce ain ha he nega i e esul is no due o inhibi o s in he sample. In ou pa ien , blood PCR o pa o i us B19 was fi s pos- i i e o 4 mon hs and 19 days a e he ansplan , wi h a p e ious nega i e esul a 73 days. The PCR me hod used in ou hospi al is he Ligh Mix®pa o i us B19 ki , which is able o de ec all 3 ypes o pa o i us. The ac ha he fi s esul was nega i e could be jus ified by he possibili y o in e mi - en i aemia o a low le el o i aemia a he ime o he measu emen . In pa ien s whose blood PCR is nega i e bu in whom clin- ical suspicion pe sis s, as in ou case he e, he defini i e diagnosis o pa o i us B19 in ec ion is pe o med by bone ma ow aspi a ion.16 I shows no only a pu e ed cell apla- sia wi h he cha ac e is ic medulla y “shu down” in he gian p oe y h oblas phase, bu also, h ough molecula biology echniques, he i us in he ma ow.3 T ea men The e a e cu en ly no an i i al d ugs ha a e e ec i e agains pa o i us B19. In anaemia associa ed wi h pa o i us B19 in ec ion, di e en he apeu ic op ions can be consid- e ed: dec easing immunosupp ession ( educ ion/wi hd awal o d ugs), changing he immunosupp essan (subs i u ing ac olimus o cyclospo in – some au ho s ha e desc ibed he de ec i e clea ance o he i us in pa ien s ea ed wi h ac olimus17 o , in o de o p o ide i us-neu alising an ibodies,18 adminis e ing IVIG a doses o 0.4–0.5 g/kg, om 2 o 10 days13 wi h a cumula i e dose ha usually anges be ween 2 and 5 g/kg).3Anaemia is co ec ed in mo e han 90% o cases wi h only one cou se o ea men , bu he isk o elapse anges om 23% o 33%.19 Ou pa ien was ea ed by a change in immunosupp es- sion, empo a ily suspending MMF oge he wi h in a enous immunoglobulin (IVIg; Flebogamma) daily o 10 days, wi h a good clinical and lab- alue ou come, helping Hb, lymphocy e and leucocy e alues o eco e g adually, and discon inuing e y h opoie in (EPO) (Figs. 1–3). Al hough ad e se eac ions o IVIg20 ha e been desc ibed, ou pa ien did no ha e any o hese diso de s, and ole a ed he d ug e y well. Al hough he had a good ini ial he apeu ic esponse, i is ecommended o closely moni o pa ien s whe e elapse and eappea ance o he anaemia is possible; his would equi e hem o be ea ed wi h a new immunoglobulin cycle e e y 3 mon hs o p e en hem.21 The possibili y o ea ing hese pa ien s wi h mTOR inhibi o s could be a p omising op ion, bu he e a e no cu - en publica ions ha suppo hei use. In ou case, we did no use i due o he pos - ansplan p o einu ia obse ed, which eached 2 g/24 h. We did no know he specific diagnosis o kidney disease ha led o haemodialysis, so he possibili y o ocal segmen al glome uloscle osis could no be uled ou . In addi ion, he his ological epo on he fi s g a biopsy e eals he p esence o a glome ulus wi h segmen al scle o- sis and mild-mode a e IgM and C3 posi i i y in 7 glome uli. This was a eason o no using mTOR inhibi o s, since ocal segmen al glome uloscle osis associa ed wi h mTOR use has been desc ibed in ansplan pa ien s. The impac o his in ec ion on he pa ien ’s su i al o long- e m mo bidi y is no known.22 No specific s a egies ha e p o ed use ul in p e en ing pa o i us B19 in ec ion.20 The ela i ely low incidence o his in ec ion and he ad e se e ec s o he he apeu ic measu es make dono / ecipien sc eening o his i us non- iable, and he de elopmen o accines o pa o i us B19 is s ill unde in es iga ion.20 Conclusion He e i is desc ibed a kidney ansplan pa ien wi h anaemia e ac o y o EPO and subsequen hype he mia, wi h he diagnosis o pa o i us B19 in ec ion. Due o he pa ien ’s immunosupp ession, he se ological an i-pa o i us IgM/IgG es s pe o med we e always nega i e. Suspec ed acu e Q e e in ec ion delayed an accu a e diagnosis, bu gi en ha he e was no clinical imp o emen wi h he ea men and no se o- con e sion occu ed, he diagnosis o Q e e in ec ion was uled ou . Then bone ma ow aspi a ion was pe o med ha e ealed pa o i us B19 in ec ion, so he diagnosis was finally made since he fi s blood PCR did no show posi i e esul s. Ou pa ien was s udied ho oughly, and cance and o he in ec ions we e also uled ou ; he symp oms disappea ed a e adjus ing he immunosupp essi e ea men and s a - ing IV Ig. Conflic s o in e es The au ho s decla e ha hey ha e no po en ial conflic s o in e es ela ed o he con en o his manusc ip . e e e n c e s 1. Ma ín-Valencia A, Pe elló-Ca ascosa M, Se ón-Micas D. Anemia en pacien e asplan ado enal secunda ia a in ección po pa o i us B19. Ne ologia. 2012;3(Sup Ex 5):22–6. 2. Yabu JM, Winkelmaye WC. Pos ansplan a ion anemia: mechanisms and managemen . Clin J Am Soc Neph ol. 2011;6:1794–801. 3. 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