Malignancies following kidney transplantation:- Post transplant Lymphoproliferative disorders.
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Malignancies following kidney transplantation:- Post transplant Lymphoproliferative disorders. Dr.Abhijit K Korane. INCIDENCE OF CANCER AFTER RENAL TRANSPLANT. The incidence of cancer in renal transplant recipients ranges from 2.3–31%.

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Malignancies following kidney transplantation post transplant lymphoproliferative disorders

Malignancies following kidney transplantation:- Post transplant Lymphoproliferative disorders.

Dr.Abhijit K Korane.


Malignancies following kidney transplantation post transplant lymphoproliferative disorders

INCIDENCE OF CANCER AFTER RENAL TRANSPLANT.


Malignancies following kidney transplantation post transplant lymphoproliferative disorders

  • The incidence of cancer in renal transplant recipients ranges from 2.3–31%.

  • The risk of de novo malignancies is increased in transplant recipients, with a relative risk 3–5 times that of the general population.

    (Andres A. Cancer incidence after immunosuppressive treatment

    following kidney transplantation. Crit Rev Oncol Hematol 2005;

    56: 71–85)


Malignancies following kidney transplantation post transplant lymphoproliferative disorders

  • Data from the Collaborative Transplant Study

    (CTS) show an increase of at least 3-fold in the

    incidence of cancer compared with the

    expected incidence in general population.

  • Australia and New Zealand Dialysis and Transplant (ANZDATA) registry shows a standardized incidence ratio of 3.46 for all cancers reported in Australia and New Zealand between 1980 and 2005 in patients after a first transplant


Anzdata australia and new zealand dialysis and transplant registry 2006

ANZDATA. Australia and New Zealand Dialysis and Transplant Registry, 2006.


Malignancies following kidney transplantation post transplant lymphoproliferative disorders

Study that included of over 35,000 first time renal transplant recipients the cancer rates for,

  • colon, lung, prostate, stomach, esophagus, pancreas, ovary and breast, were roughly twofold higher.

  • melanoma, leukemia, hepatobiliary tumors, cervical and vulvovaginal tumors were approximately fivefold more common;

  • testicular and bladder cancers were increased approximately threefold; 15-fold more common. Finally,

  • KS, NHL and nonmelanoma skin cancers were encountered with over 20-fold increased frequency.

    (Penn, I. Cancers complicating organ transplantation. N Engl J Med 1990;323:1767.)


Malignancies following kidney transplantation post transplant lymphoproliferative disorders

Defining Characteristics of

PTLD


Malignancies following kidney transplantation post transplant lymphoproliferative disorders

PTLD refers not to a single disease but to a syndrome that includes a wide range of abnormal hyperplastic (inflammatory or reactive) and neoplastic lymphocyte growths, ranging from a benign self-limited form of lymphoproliferation to an aggressive, widely disseminated disease.


Malignancies following kidney transplantation post transplant lymphoproliferative disorders

INCIDENCE OF PTLD


Malignancies following kidney transplantation post transplant lymphoproliferative disorders

The disease occurs in around 1–10% of transplant recipients, is the most common malignancy in transplanted children, and is second only to squamous cell cancer in adults.

(Penn I. The problem of cancer in organ Transplant recipients: an

overview. Transplant Sci 1994;4:23–32.)


Malignancies following kidney transplantation post transplant lymphoproliferative disorders

Over 50% of PTLD cases are associated with primary EBV infection and this accounts for the particular risk to paediatric transplant recipients.


Malignancies following kidney transplantation post transplant lymphoproliferative disorders

  • Cincinnati Transplant Tumor Registry (CTTR) which has collected data on more than 6,000 patients.

  • According to the CTTR,PTLD accounts for 16% of cancers intransplant recipients compared with 5% in the general population.


Malignancies following kidney transplantation post transplant lymphoproliferative disorders

  • Collaborative Transplant Study (CTS) database reported incidence of NHL in 200 000 solid organ recipients.

  • The cumulative incidence of NHL in renal transplant recipients between 1985 and 2001 was significantly increased.


Malignancies following kidney transplantation post transplant lymphoproliferative disorders

  • The incidence of NHL is generally highest in the first year after transplant,

  • The relative risk of lymphoma was 11.8 compared with the general population.


Incidence in india

Incidence in India

  • The overall incidence of malignancies in Indian transplant recipients is not known.

  • Less than 2% of primarily azathioprine-prednisolone treated transplant recipients developed cancers.

    (Sakhuja V, Jha V, Ghosh AK, Singh SK, Chugh KS. Low incidence of malignancies following renal transplantation in India. Nephrology 1995; 1:301)


Malignancies following kidney transplantation post transplant lymphoproliferative disorders

Conclusions, from single centre studies,

  • The overall incidence of malignancies is lower in contrast to the western countries,

    2. The skin cancer incidence is much lower,

    3. PTLD is the commonest malignancy in the Indian transplant population,

    4. Majority of PTLD is encountered after the first year.

    (Sakhuja V, Jha V, Ghosh AK, Singh SK, Chugh KS. Low incidence o malignancies following renal transplantation in India. Nephrology 1995; 1:301)


Malignancies following kidney transplantation post transplant lymphoproliferative disorders

  • In analysis of 294 patients followed up for more than 6 months after transplantation six malignancies were noted in four patients, giving an incidence of 2%.

  • Among 157 of those who were followed up for more than 2 years, the incidence was 3.8%. Most of these patients were from the pre- CNI era.


Malignancies following kidney transplantation post transplant lymphoproliferative disorders

More recent analysis, a total of 26malignancies

out of 1400 transplant patients, giving an

incidence of 1.4%. PTLD formed the largest

chunk, accounting for 19 cases (63.3%).


Malignancies following kidney transplantation post transplant lymphoproliferative disorders

  • Pathophysiology


Malignancies following kidney transplantation post transplant lymphoproliferative disorders

Most PTLDs are of B-cell origin

  • Early onset PTLDs are mainly regarded as EBV–driven lymphoproliferations that are frequently polyclonal or oligoclonal,

  • Late onset PTLDs are true monoclonal lymphoid malignancies that are not necessarily associated with EBV infection


Malignancies following kidney transplantation post transplant lymphoproliferative disorders

  • Over 95% of the adult population worldwide is infected with EBV, with infection usually occurring in childhood.

  • Initial infection of B lymphocytes in pharyngeal lymphoid tissues follows transmission of virus through salivary exchange.


Malignancies following kidney transplantation post transplant lymphoproliferative disorders

  • Primary infection of healthy individuals is not accompanied by disease, although infectious mononucleosis occurs in around 50% of individuals in whom infection is delayed until adolescence.


Malignancies following kidney transplantation post transplant lymphoproliferative disorders

  • Primary disease in the transplant recipient is transmitted from an EBV seropositive person to an EBV seronegative recipient.

  • Reactivation infection occurs in the immunocompromised host who is seropositive at the time of transplantation because of EBV exposure in childhood or adolescence


Epstein barr virus

Epstein-Barr Virus

EBV is an enveloped herpesvirus with a 172 kb double stranded DNA genome.


Malignancies following kidney transplantation post transplant lymphoproliferative disorders

  • Core:- single linear molecule of dsDNA .

  • Capsid:- Surrounding the core is an icosahedralcapsid with a 100 nm diameter constructed of 162 capsomeres.

  • Tegument:- Between the capsid and envelope. It consists of viral enzymes.

  • Envelope:- The envelope is the outer layer of the virion.


Malignancies following kidney transplantation post transplant lymphoproliferative disorders

PRIMARY EBV INFECTION


Malignancies following kidney transplantation post transplant lymphoproliferative disorders

  • Immunosuppressed patients are at risk for B-cell lymphoproliferative diseases,

  • These diseases are a heterogeneous collection of disorders that usually carry the virus and express the growth program.


Malignancies following kidney transplantation post transplant lymphoproliferative disorders

  • Primary EBV infection in vivo generally occurs at an early age and is usually asymptomatic.

  • Infection if acquired during adolescence result in infectious mononucleosis.

  • During the early stages of infectious mononucleosis extremely large numbers of EBV-infected B cells circulate in the blood, but they are all resting memory cells.


Malignancies following kidney transplantation post transplant lymphoproliferative disorders

Resolution of the infection,

  • Infection by EBV is controlled by both cellular and humoral immune mechanisms.

  • Antibody limits the spread of infectious virus,

    and cytotoxic T cells destroy infected cells that express viral proteins.


Malignancies following kidney transplantation post transplant lymphoproliferative disorders

The major targets for control of EBV by the immune system are memory cells that have initiated viral replication. By killing these cells and preventing the spread of infectious virus by antibody, the immune response reduces the level of infection


Malignancies following kidney transplantation post transplant lymphoproliferative disorders

  • A defining feature of herpesviruses is their ability to maintain a latent infection with the virus genome retained in host cells without production of infectious virions.


Malignancies following kidney transplantation post transplant lymphoproliferative disorders

RISK FACTORS


Risk factors associated with post transplant malignancy

Risk factors associated with post-transplant malignancy


Malignancies following kidney transplantation post transplant lymphoproliferative disorders

Primary EBV infection:-

Analysis of 381 consecutive non-renal

transplant recipients at a US clinic, the risk of

PTLD was 24 times higher in EBV-seronegative

recipients than in those seropositive for EBV at

the time of transplantation.

(Walker RC, Marshall WF, Strickler JG et al. Pretransplantation assessment of the risk of lymphoproliferative disorder. Clin Infect Dis 1995; 20: 1346–1353)


Malignancies following kidney transplantation post transplant lymphoproliferative disorders

Several single-center analyses have found that

EBVseronegative patients experienced a 10-

76-fold greater incidence of PTLD when

compared with their seropositive counterparts

(Preiksaitis JK, Cockfield SM. Epstein-Barr virus and lymphoproliferative

disorders after transplantation. In: Bowden RA, Ljungman P, Paya CV, eds.

Transplant infections. Philadelphia:

Lippincott-Raven,1998:245–63. 12. Ellis D, Jaffe R, Green M, et al. Epstein-Barr

virus–related Disorders in children undergoing renal transplantation with

tacrolimus-based immunosuppression. Transplantation 1999; 68:997–1003.)


Malignancies following kidney transplantation post transplant lymphoproliferative disorders

-Use of the monoclonal antibody OKT3,

-Cytomegalovirus (CMV)-seropositive donor,

-Younger age at transplantation,

-Infection with hepatitis C,


Malignancies following kidney transplantation post transplant lymphoproliferative disorders

Lower incidence of PTLD in Asia compared with

Western countries and a lower incidence in

recipients from particular ethnic groups

including Arabic, Jewish, Black and

Mediterranean individuals


Malignancies following kidney transplantation post transplant lymphoproliferative disorders

Immunosuppressive regimens and

PTLD


Malignancies following kidney transplantation post transplant lymphoproliferative disorders

No significant difference in the 5-year incidence of lymphoma or rate of lymphoma development between patients receiving ciclosporin ,( with or without azathioprine and steroids) and those receiving azathioprine and steroids only.

(Opelz G, Dohler B. Lymphomas after solid organ transplantation:a

collaborative transplant study report. Am J Transplant 2003; 4: 222–

230)


Malignancies following kidney transplantation post transplant lymphoproliferative disorders

  • Tacrolimus use was associated with a significant increase in the risk of PTLD in renal transplant recipients compared with CsA,


Malignancies following kidney transplantation post transplant lymphoproliferative disorders

  • OKT3 and ATG appeared to increase the risk of lymphoma only in the first year after transplant, with a subsequent PTLD risk similar to that in patients who did not receive antibody therapy.

  • Induction therapy with anti-interleukin (IL) 2 antibodies was not associated with any increase in the risk of PTLD

    (Opelz G, Dohler B. Lymphomas after solid organ transplantation:a collaborative transplant

    study report. Am J Transplant 2003; 4: 222–230)


Malignancies following kidney transplantation post transplant lymphoproliferative disorders

Opelz G, Dohler B. Lymphomas after solid organ transplantation:a collaborative transplant study report. Am J Transplant2004; 4: 222–230


Malignancies following kidney transplantation post transplant lymphoproliferative disorders

PosttransplantationLymphoproliferative Disorder Associated with OKT3 andDecreased Antiviral Prophylaxis in Pancreas Transplant RecipientsClinical Infectious Diseases 1998;26:596–600


Malignancies following kidney transplantation post transplant lymphoproliferative disorders

Lymphoproliferative Disorders After Renal Transplantationin Patients Receiving Triple or Quadruplelmmunosuppression J. Am. Soc. Nephrol. 1992; 2:5290-5294


Malignancies following kidney transplantation post transplant lymphoproliferative disorders

Robson R, Cecka JM, Opelz G, Budde M, Sacks S. Prospective registry-based

observational cohort study of the long-term risk of malignancies in rena

transplant patients treated with mycophenolate mofetil. Am J Transplant 2005;

5: 2954–2960

  • Tacrolimus was also associated with an increased risk of PTLD,

  • Anti-IL-2 antibodies and sirolimus not associated with an increased risk of PTLD

  • Azathioprine and MMF were associated with a reduced risk of PTLD.


Malignancies following kidney transplantation post transplant lymphoproliferative disorders

In a transplant centre in Denmark, including

667 patients, showed no increase in the

incidence of PTLD after the introduction of

CsA, OKT3 or ATG. MMF was associated with a

decrease in the incidence of PTLD.

(Birkeland SA, Hamilton-Dutoit S. Is Posttransplant lymphoproliferative disorder

(PTLD) caused by any specific immunosuppressive drug or by the

transplantation per se? Transplantation 2003; 76: 984–988)


Malignancies following kidney transplantation post transplant lymphoproliferative disorders

Classification Systems


Malignancies following kidney transplantation post transplant lymphoproliferative disorders

Frizzera G, Hanto DW (1981)recognized 4 categories of posttransplantation lymphoid growths:

1) Normal reactive hyperplasia,

2) True lymphomas,

3) Polymorphic diffuse B-cell hyperplasia,

4) Polymorphic B-cell lymphoma.


Malignancies following kidney transplantation post transplant lymphoproliferative disorders

Nalesnik MA, Jaffe R (1988) subdivided PTLD into 2 major categories,

1) Polymorphic PTLD, including polymorphic diffuse B-cell hyperplasia and polymorphic B-cell lymphoma, and

2)Monomorphic PTLD, including immunoblastic sarcoma and other forms of lymphoma.


Malignancies following kidney transplantation post transplant lymphoproliferative disorders

American Society of Hematopathology (1997),

1)Early lesions,

-infectious mononucleosis,

-plasma cell hyperplasia.

2)Polymorphic category,

3) Monomorphic category,

various B-, T-, and natural killer (NK) lymphocyte neoplasms.

4)Miscellaneous,

Hodgkin-like lymphom, plasmacytoma, multiple myeloma.


Malignancies following kidney transplantation post transplant lymphoproliferative disorders

World Health Organization classification of PTLD


Malignancies following kidney transplantation post transplant lymphoproliferative disorders

Staging of PTLD.

ANN ARBOR STAGING WITH COSTWALDS MODIFICATION


Malignancies following kidney transplantation post transplant lymphoproliferative disorders

Staging of PTLD.

  • Although no staging system currently exists for PTLD, it is recommended that the Ann Arbor staging classification system with Cotswold’s modifications that is used to stage non-Hodgkin’s lymphomas be applied to PTLD.


Malignancies following kidney transplantation post transplant lymphoproliferative disorders

Principal stages,

  • Stage I indicates that the cancer is located in a single region, usually one lymph node and the surrounding area.

  • Stage II indicates that the cancer is located in two separate regions, an affected lymph node or organ within the lymphatic system and a second affected area, and that both affected areas are confined to one side of the diaphragm


Malignancies following kidney transplantation post transplant lymphoproliferative disorders

  • Stage III indicates that the cancer has spread to both sides of the diaphragm, including one organ or area near the lymph nodes or the spleen.

  • Stage IV indicates diffuse or disseminated involvement of one or more extralymphatic organs, including any involvement of the liver, bone marrow, or nodular involvement of the lungs.


Malignancies following kidney transplantation post transplant lymphoproliferative disorders

  • A or B: the absence of constitutional (B-type) symptoms is denoted by adding an "A" to the stage; the presence is denoted by adding a "B" to the stage.

  • E: is used if the disease is "extranodal" (not in the lymph nodes) or has spread from lymph nodes to adjacent tissue.

  • X: is used if the largest deposit if >10 cm large ("bulky disease"), or whether the mediastinumis wider than 1/3 of the chest on a chest X-ray.


Malignancies following kidney transplantation post transplant lymphoproliferative disorders

Clinical Presentation


Malignancies following kidney transplantation post transplant lymphoproliferative disorders

Posttransplantation lymphoproliferative disorders may present as symptoms from localized or systemic involvement or in the asymptomatic patient incidental to other clinical or radiographic findings.


Malignancies following kidney transplantation post transplant lymphoproliferative disorders

Time to Onset

  • PTLD can present as early as less than a month to as late as several years after transplantation.

  • In general, however, PTLD is remarkable for a short posttransplantation time of onset.


Malignancies following kidney transplantation post transplant lymphoproliferative disorders

The time of onset is shorter in cyclosporine- and tacrolimus-treated patients than in the precyclosporine era.

(Mihalov ML, Gattuso P, Abraham K, et al. Incidence of post-transplant

malignancy among 674 solid-organ-transplant recipients at a single center.

Clin Transplant. 1996;10:248-255.)


Malignancies following kidney transplantation post transplant lymphoproliferative disorders

47% of cases occur within 6 months,

62% within 1 year,

90% within 5 years following transplantation.

Posttransplantation Lymphoproliferative Disorders. Michael Nalesnik, MD, Anthony J. Demetris, MD, John J. Fung, MD, PhD, Parmjeet Randhawa, MD, Adriana Zeevi, PhD


Malignancies following kidney transplantation post transplant lymphoproliferative disorders

  • PTLDs that do not contain EBV tend to arise at a later time than those that do contain the virus.

  • 50% of EBV-positive PTLDs arose by 6 months following transplantation, whereas the 50% mark for occurrence of EBV-negative PTLDs was not reached until 5 years after transplantation.


Malignancies following kidney transplantation post transplant lymphoproliferative disorders

Clinical Manifestations include,

(1) An infectious mononucleosis-like syndrome with or without generalizedlymphadenopathy,

(2) One or more nodal or extranodal tumors,

(3) A fulminant and disseminated presentation with sepsis.


Malignancies following kidney transplantation post transplant lymphoproliferative disorders

Infectious mononucleosis-like syndrome

  • A mononucleosis syndrome may occur early after transplantation, particularly in association with a primary EBV infection.

  • This presentation is particularly common in the pediatric population, and indeed, in some cases it is infectious mononucleosis.

  • Otolaryngologic symptoms and findings are often the first manifestation of PTLD in children.


Malignancies following kidney transplantation post transplant lymphoproliferative disorders

  • Patients may present with tonsillitis, tonsillar necrosis, lymphadenitis, sinusitis, and otitis media. There is a tendency for more severe upper airway symptoms, including airway obstruction.


Malignancies following kidney transplantation post transplant lymphoproliferative disorders

  • A PTLD that occurs later is more likely to be circumscribed anatomically and to be associated with a more gradual clinical course.

  • Extranodal disease with visceral involvement is common with gastrointestinal, pulmonary, or central nervous system (CNS) symptoms.

  • Lymphadenopathy is painless, and atypical lymphocytes may or may not be present in the white blood cell differential count.


Malignancies following kidney transplantation post transplant lymphoproliferative disorders

The allograft can also be involved.

  • The frequency of involvement varies according to the specific type of allograft.

  • PTLDs that arise in lung or intestinal transplant recipients involve those allografts in up to 80% of cases.

  • Liver and kidney, involve the allograft in about one third of cases.

  • The transplanted heart is only rarely involved with these tumors.


Malignancies following kidney transplantation post transplant lymphoproliferative disorders

DIAGNOSIS OF PTLD


Malignancies following kidney transplantation post transplant lymphoproliferative disorders

Clinical Diagnosis,

  • Awareness of this syndrome.

  • Isolated or systemic lymphadenopathy that suddenly appear should include PTLD in the differential diagnosis.

  • Abdominal pain, particularly with evidence of intestinal bleeding, raises the possibility of PTLD in the GI tract.

  • Persistent headaches or CNS symptoms suggest localization to the brain.

  • Upper respiratory tract infections that may be associated with lymphadenopathy or that do not resolve after a course of antibiotics should raise a suspicion of PTLD.


Malignancies following kidney transplantation post transplant lymphoproliferative disorders

Primary EBV infections:-

can be detected by seroconversion, with

development of antiviral capsid antigen IgM

and IgG antibodies and anti–early antigen and

anti–Epstein-Barr nuclear antigen (EBNA)

antibodies


Malignancies following kidney transplantation post transplant lymphoproliferative disorders

Pitfalls of serological tests:-

  • Transplant patients can fail to produce detectable anti-EBNA- 1 antibodies in the setting of primary infection,

  • Patients who are seropositive before transplantation can have falling anti-EBNA-1 titers associated with higher EBV loads and the development of PTLD


Malignancies following kidney transplantation post transplant lymphoproliferative disorders

Pathologic examination of tissue is currently the gold standard for PTLD diagnosis.

Biopsy of lymph nodes and sites of extranodal involvement (ie, organs, bone marrow) is the definitive diagnostic test.


Malignancies following kidney transplantation post transplant lymphoproliferative disorders

Biopsy specimens are analyzed for massive infiltration of B cells and plasma cells and may be subjected to in situ hybridization or immunostaining for detection of EBV


Monomorphic post transplant lymphoproliferative disorder

Monomorphic post-transplant lymphoproliferativedisorder


Malignancies following kidney transplantation post transplant lymphoproliferative disorders

PREVENTION OF PTLD,


Malignancies following kidney transplantation post transplant lymphoproliferative disorders

PREVENTION OF PTLD,

  • Patients who are at high risk for the development of PTLD should be identified before transplantation.

  • EBV infection is a significant risk factor for PTLD development, EBV serostatus should be determined for all potential transplant recipients.


Malignancies following kidney transplantation post transplant lymphoproliferative disorders

  • Patients who are also at risk for primary CMV infection or severe CMV disease should be identified.

  • Children, and patients who receive large doses of immunosuppression (especially OKT3) either for induction or allograft rejection should be considered to be at high risk for PTLD.


Malignancies following kidney transplantation post transplant lymphoproliferative disorders

  • Aggressive supplemental immunosuppression should be used only in the presence of biopsy-proven acute rejection.

  • Because PTLD frequently presents with allograft dysfunction, it is important distinguish early PTLD from rejection before more potent antirejection therapy is started.


Malignancies following kidney transplantation post transplant lymphoproliferative disorders

  • Antiviral agents with activity against EBV may be of benefit as prophylaxis for the prevention of PTLD.

  • Because CMV disease is a cofactor in PTLD development and because ganciclovir has greater activity against EBV in vitro, the use of ganciclovir may be preferable to acyclovir use.


Malignancies following kidney transplantation post transplant lymphoproliferative disorders

  • Comparisons of the incidence of PTLD in patients receiving and not receiving acyclovir or ganciclovir prophylaxis suggest that either prophylactic antiviral drug may be of some benefit however, PTLD has also been documented in patients receiving ganciclovir or acyclovir prophylaxis.

    (Keay S, Oldach D,Wiland A, et al. Post-transplant lymphoproliferative disorder

    associated with OKT3 and decreased antiviral prophylaxis in pancreastransplant

    recipients. Clin Infect Dis 1998; 26:596–600.)


Malignancies following kidney transplantation post transplant lymphoproliferative disorders

PosttransplantationLymphoproliferative Disorder Associated with OKT3 andDecreased Antiviral Prophylaxis in Pancreas Transplant RecipientsClinical Infectious Diseases 1998;26:596–600


Malignancies following kidney transplantation post transplant lymphoproliferative disorders

Monitoring of EBV load


Malignancies following kidney transplantation post transplant lymphoproliferative disorders

The monitoring of EBV load in patients who are at high risk for PTLD is a promising technique that would permit preemptive treatment in the form of reduction of immunosuppression and/or the use of antiviral agents.


Malignancies following kidney transplantation post transplant lymphoproliferative disorders

MANAGMENT


Malignancies following kidney transplantation post transplant lymphoproliferative disorders

Reduction of Immunosuppression


Malignancies following kidney transplantation post transplant lymphoproliferative disorders

The most important initial strategy in the management of PTLD is to reduce and even to discontinue immunosuppressive therapy, with regression evident in 23%–50%.

(Starzl TE, Nalesnik MA, Porter KA, et al. Reversibility of lymphomas and

lymphoproliferative lesions developing under cyclosporine-steroid therapy.

Lancet 1984; 1:584–7.)

( Swinnen LJ, Mullen GM, Carr TJ, et al. Aggressive treatment for

postcardiac transplant lymphoproliferation. Blood 1995; 86:3333–4.)


Malignancies following kidney transplantation post transplant lymphoproliferative disorders

How should immunosuppression be reduced?

  • Should it be withdrawn or reduced in a stepwise manner?

  • There are limited data to suggest that high EBV loads are immunosuppressive, and rejection events are highly unlikely if the patient’s virus load remains above specific levels.


Malignancies following kidney transplantation post transplant lymphoproliferative disorders

Treatment of EBV-associated PTLD,

  • Antiviral drugs,

  • Immunoglobulin therapy,

  • IFN-alpha.


Malignancies following kidney transplantation post transplant lymphoproliferative disorders

4. Monoclonal malignancies:-chemotherapy CHOP(cyclophosphamide, doxorubicin, vincristine, prednisone) or cyclophosphamide

plus prednisone.

5.Radiotherapy may be useful for central nervous system involvement and localized disease.

6. Cellular immunotherapy.


Malignancies following kidney transplantation post transplant lymphoproliferative disorders

IFN-a:-

Has both antiviral and antiproliferative activity

The association of T-helper cell type 2 cytokine

Responses with PTLD, and their disappearance

after PTLD resolution, lends support to the use

of IFN-a for treatment of this disorder.

(Faro A. Interferon-alpha and its effects on post-transplant lymphoproliferative

disorders. Springer Semin Immunopathol 1998; 20:425–36.)


Malignancies following kidney transplantation post transplant lymphoproliferative disorders

Conversion to proliferation signal inhibitors (PSIs)

PSIs inhibit tumour growth and progression; therefore, they may have the potential to prevent malignancy in this at-risk population.


Malignancies following kidney transplantation post transplant lymphoproliferative disorders

  • Everolimus has found to have an inhibitory effect on the growth of PTLD cell lines while delaying the progression, and inducing regression, of established tumours in an in vivo experimental model.

  • Sirolimus also has a potent anti-proliferative effect on in vitro PTLD-derived cell lines and has been shown to inhibit the growth of solid tumours in a mouse model of PTLD.


Malignancies following kidney transplantation post transplant lymphoproliferative disorders

Efficacy and safety of rituximab in B-cell post-transplantation lymphoproliferativedisorders: results of a prospective multicenter phase 2 studyBLOOD, 15 APRIL 2006 VOLUME 107, NUMBER 8

  • Fortysix patients were included.

  • Treatment consisted of 4 weekly injections of rituximab at 375mg/m2.

  • The overall survival rate at 1 year was 67%. Conclude that rituximab is effective and safe in PTLD, with stable responses at 1 year.


Malignancies following kidney transplantation post transplant lymphoproliferative disorders

Cellular immunotherapy.


Malignancies following kidney transplantation post transplant lymphoproliferative disorders

  • In allogeneic HST patients, there is another option for both prevention and treatment: cellular or adoptive immunotherapy.

  • Treatment with unselected donor mononuclear cells resulted in high response rates, but carried a significant risk of GVHD.

  • However, over 90% of patients may respond to DLI.

    (Rooney CM, Smith CA, Ng CY et al. Use of gene-modified virus-specific T lymphocytes to

    control Epstein–Barr-virusrelated lymphoproliferation. Lancet 1995; 345: 9–13.)


Malignancies following kidney transplantation post transplant lymphoproliferative disorders

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