Secondary solid cancer screening following hematopoietic cell transplantation.

Hematopoietic stem cell transplant (HCT) recipients have a substantial risk of developing secondary solid cancers, particularly beyond 5 years after HCT and without reaching a plateau overtime. A working group was established through the Center for International Blood and Marrow Transplant Research and the European Group for Blood and Marrow Transplantation with the goal to facilitate implementation of cancer screening appropriate to HCT recipients. The working group reviewed guidelines and methods for cancer screening applicable to the general population and reviewed the incidence and risk factors for secondary cancers after HCT. A consensus approach was used to establish recommendations for individual secondary cancers. The most common sites include oral cavity, skin, breast and thyroid. Risks of cancers are increased after HCT compared with the general population in skin, thyroid, oral cavity, esophagus, liver, nervous system, bone and connective tissues. Myeloablative TBI, young age at HCT, chronic GVHD and prolonged immunosuppressive treatment beyond 24 months were well-documented risk factors for many types of secondary cancers. All HCT recipients should be advised of the risks of secondary cancers annually and encouraged to undergo recommended screening based on their predisposition. Here we propose guidelines to help clinicians in providing screening and preventive care for secondary cancers among HCT recipients.

Clinical guide to fertility preservation in hematopoietic cell transplant recipients.

With broadening indications, more options for hematopoietic cell transplantation (HCT) and improvement in survival, the number of long-term HCT survivors is expected to increase steadily. Infertility is a frequent problem that long-term HCT survivors and their partners face and it can negatively impact on the quality of life. The most optimal time to address fertility issues is before the onset of therapy for the underlying disease; however, fertility preservation should also be addressed before HCT in all children and patients of reproductive age, with referral to a reproductive specialist for patients interested in fertility preservation. In vitro fertilization (IVF) and embryo cryopreservation, oocyte cryopreservation and ovarian tissue banking are acceptable methods for fertility preservation in adult women/pubertal females. Sperm banking is the preferred method for adult men/pubertal males. Frequent barriers to fertility preservation in HCT recipients may include the perception of lack of time to preserve fertility given an urgency to move ahead with transplant, lack of patient-physician discussion because of several factors (for example, time constraints, lack of knowledge), inadequate access to reproductive specialists, and costs and lack of insurance coverage for fertility preservation. There is a need to raise awareness in the medical community about fertility preservation in HCT recipients.

Physician perceptions and practice patterns regarding fertility preservation in hematopoietic cell transplant recipients.

Physician practice variation may be a barrier to informing hematopoietic cell transplant (HCT) recipients about fertility preservation (FP) options. We surveyed HCT physicians in the United States to evaluate FP knowledge, practices, perceptions and barriers. Of the 1035 physicians invited, 185 completed a 29-item web-survey. Most respondents demonstrated knowledge of FP issues and discussed and felt comfortable discussing FP. However, only 55% referred patients to an infertility specialist. Most did not provide educational materials to patients and only 35% felt that available materials were relevant for HCT. Notable barriers to discussing FP included perception that patients were too ill to delay transplant (63%), patients were already infertile from prior therapy (92%) and time constraints (41%). Pediatric HCT physicians and physicians with access to an infertility specialist were more likely to discuss FP and to discuss FP even when prognosis was poor. On analyses that considered physician demographics, knowledge and perceptions as predictors of referral for FP, access to an infertility specialist and belief that patients were interested in FP were observed to be significant. We highlight variation in HCT physician perceptions and practices regarding FP. Physicians are generally interested in discussing fertility issues with their patients but lack educational materials.

Second malignancies after autologous hematopoietic cell transplantation in children.

Childhood autologous hematopoietic cell transplant (auto-HCT) survivors can be at risk for secondary malignant neoplasms (SMNs). We assembled a cohort of 1487 pediatric auto-HCT recipients to investigate the incidence and risk factors for SMNs. Primary diagnoses included neuroblastoma (39%), lymphoma (26%), sarcoma (18%), central nervous system tumors (14%) and Wilms tumor (2%). Median follow-up was 8 years (range, <1-21 years). SMNs were reported in 35 patients (AML/myelodysplastic syndrome (MDS)=13, solid cancers=20, subtype missing=2). The overall cumulative incidence of SMNs at 10 years from auto-HCT was 2.60% (AML/MDS=1.06%, solid tumors=1.30%). We found no association between SMNs risk and age, gender, diagnosis, disease status, time since diagnosis or use of TBI or etoposide as part of conditioning. OS at 5-years from diagnosis of SMNs was 33% (95% confidence interval (CI), 16-52%). When compared with age- and gender-matched general population, auto-HCT recipients had 24 times higher risks of developing SMNs (95% CI, 16.0-33.0). Notable SMN sites included bone (N=5 SMNs, observed (O)/expected (E)=81), thyroid (N=5, O/E=53), breast (N=2, O/E=93), soft tissue (N=2, O/E=34), AML (N=6, O/E=266) and MDS (N=7, O/E=6603). Risks of SMNs increased with longer follow-up from auto-HCT. Pediatric auto-HCT recipients are at considerably increased risk for SMNs and need life-long surveillance for SMNs.

Allogeneic hematopoietic SCT for alpha-mannosidosis: an analysis of 17 patients.

Alpha-mannosidosis is a rare lysosomal storage disease. Hematopoietic SCT (HSCT) is usually recommended as a therapeutic option though reports are anecdotal to date. This retrospective multi institutional analysis describes 17 patients that were diagnosed at a median of 2.5 (1.1-23) years and underwent HSCT at a median of 3.6 (1.3-23.1) years. In all, 15 patients are alive (88%) after a median follow-up of 5.5 (2.1-12.6) years. Two patients died within the first 5 months after HSCT. Of the survivors, two developed severe acute GvHD (>=grade II) and six developed chronic GvHD. Three patients required re-transplantation because of graft failure. All 15 showed stable engraftment. The extent of the patients' developmental delay before HSCT varied over a wide range. After HSCT, patients made developmental progress, although normal development was not achieved. Hearing ability improved in some, but not in all patients. We conclude that HSCT is a feasible therapeutic option that may promote mental development in alpha-mannosidosis.

Fluticasone, azithromycin and montelukast therapy in reducing corticosteroid exposure in bronchiolitis obliterans syndrome after allogeneic hematopoietic SCT: a case series of eight patients.

Bronchiolitis obliterans syndrome (BOS) is a devastating pulmonary complication affecting long-term survivors of allogeneic hematopoietic cell transplantation. Treatment of BOS with prolonged courses of high dose corticosteroids is often associated with significant morbidity. Reducing the exposure to corticosteroids may reduce treatment-related morbidity. Our institution has recently begun to treat patients with emerging therapies in an effort to diminish corticosteroid exposure. We retrospectively reviewed the 6-month corticosteroid exposure, lung function and failure rates in eight patients with newly diagnosed BOS who were treated with a combination of fluticasone, azithromycin and montelukast (FAM) and a rapid corticosteroid taper. These patients were compared with 14 matched historical patients who received high-dose corticosteroids, followed by a standard taper. The median 6-month prednisone exposure in FAM-treated patients was 1819 mg (0-4036 mg) compared with 7163 mg (6551-7829 mg) in the control group (P=0.002). The median forced expiratory volume in 1 s (FEV(1)) change in FAM-treated patients was 2% (-3 to 4%] compared with 1% (-4 to 5%) in the control group (P=1.0). Prednisone exposure in FAM patients was one quarter that of a retrospective-matched group of patients, with minimal change in median FEV(1), suggesting that BOS may be spared of the morbidities associated with long-term corticosteroid use by using alternative agents with less side effects.

Skin response using NIH consensus criteria vs Hopkins scale in a phase II study for steroid-refractory chronic GVHD.

One of the obstacles to chronic GVHD research is the lack of standardized response criteria. The National Institute of Health (NIH) has recommended response criteria at a Consensus Conference. These need to be validated. We recently completed and reported a trial of pentostatin in treating steroid-refractory chronic GVHD. During the trial, we prospectively collected percent body-surface-area (BSA) involvement of rash, superficial sclerosis and deep sclerosis. Here, we compare cutaneous responses using the NIH scale and the Hopkins scale. The two scales produced similar overall response rates but different domain response rates. There was 80% agreement in overall response at the final treatment evaluation, but only a 64% agreement for fasciitis/non-moveable sclerosis. There was more disparity in the measurement of sclerosis than in that of erythema, which highlights the difficulty of quantifying sclerosis. For sclerosis, the Hopkins scale, which used skin softening, was more predictive of early response as compared with the NIH scale, which focused on percent BSA. Early assessment of skin softening may be important if trying to detect the activity of a particular agent in chronic GVHD. Further validation of the NIH scale is ongoing, which should produce a clinically useful and predictive scale.

Acute graft-versus-host disease in children.

Acute graft-versus-host disease (GVHD) is one of the major complications of hematopoietic stem cell transplantation. Many variables including stem cell source, age of donor and recipient, preparative regimen and prophylaxis can impact the likelihood and severity of GVHD. The major portion of this review concentrates on risk factors, treatment and outcome, since here we may see differences between children and adults. Pathophysiology and manifestations/grading of acute GVHD are also briefly presented. An effort has been made to concentrate either on pediatric trials or look specifically at the pediatric subset of larger studies.

Weight loss and reduced body mass index: a critical issue in children with multiorgan chronic graft-versus-host disease.

Weight loss and malnutrition are major problems in patients with chronic graft-versus-host disease (GVHD). In adults, low body mass index (BMI) is a predictor for mortality; however, weight loss and BMI have not been studied in pediatric chronic GVHD. A retrospective study on 18 children with extensive chronic GVHD was completed. Median age at SCT was 12.3 (range 0.6-23) years; age at chronic GVHD diagnosis was 12.5 (1-23) years. Patients with multiorgan involvement had a mean maximal decrease in BMI of 20.9% and most dropped below 10th percentile in expected weight-for-age. This change in BMI not only indicates a significant decrease in weight but often a plateau in stature. In contrast, patients with one organ system involved had a mean maximal decrease in BMI of 5% and did not fall below 10th percentile. All patients with multiorgan involvement required salvage therapy beyond steroids and CSA. Three patients died due to complications of chronic GVHD. Weight loss and malnutrition (as reflected by a decrease in BMI) are clinically significant issues in children with multisystem chronic GVHD. Weight loss is likely another systemic manifestation of the disease and may contribute, along with other factors such as increased immunosuppression and infection, to increased mortality in this group.

Outcomes of unrelated cord blood transplants and allogeneic-related hematopoietic stem cell transplants in children with high-risk acute lymphocytic leukemia.

Acute lymphocytic leukemia (ALL) is a common indication for hematopoietic stem cell transplantation (HSCT) in children. Use of unrelated cord blood (UCB) has become increasingly popular as a stem cell source, given the rapid availability and decreased GVHD potential. Publications describing outcomes of children with leukemia who underwent UCB transplants have compared them to those having received unrelated donor marrow transplants. Results are similar. We compared our outcomes using UCB vs allogeneic-related hematopoietic stem cells in pediatric ALL patients since 1992. A total of 49 patients were analyzed. All patients were either in CR1 with high-risk features (n=21) or in CR2 (n=28) with initial remission less than 36 months. Patients received myeloablation with fractionated total body irradiation, cyclophosphamide, and etoposide and GVHD prophylaxis with cyclosporine and methotrexate. Antithymocyte globulin was added for UCB recipients to address the HLA differences. In all, 23 patients underwent allogeneic -related HSCT and 26 underwent UCB transplantation. Other than increased time to engraftment for UCB recipients, results are equivalent. The 3-year overall survival is 64% and 3-year event-free survival is 60% for both groups. Rates of GVHD and transplant-related mortality are also equivalent. UCB is a reasonable option for children with ALL who are referred for HSCT.

High incidence of graft failure in children receiving CD34+ augmented elutriated allografts for nonmalignant diseases.

T-cell depletion of the marrow graft using counterflow centrifugal elutriation reduces the risk of graft-versus-host disease (GVHD). However, because of high rates of graft failure and relapse, elutriation alone has not improved survival. We have carried out a phase II clinical trial in 54 pediatric patients to determine if CD34+ selection to rescue pluripotent stem cells from the small lymphocyte fraction improves engraftment. The processed grafts contained a mean of 5.5 x 10(7) cells/kg IBW, 4.7 x 10(6) CD34+ cells/kg IBW, and 6.3 x 10(5) CD3+cells/kg IBW. Patients achieved an ANC >500 at a median of 16 days and platelet count >20 000 at a median of 28 days. The incidence of clinically significant GVHD was 19%. In total, 10 patients enrolled in this study experienced graft failure, with eight of the 14 patients transplanted for nonmalignant indications failing to engraft stably. Graft failure was statistically significantly associated with nonmalignant diagnosis (P<0.001), but was not associated with CMV seropositivity, donor gender, or cell counts of the allograft. We conclude that although time to engraftment is similar to that seen with unmanipulated grafts, graft failure remains a significant problem in patients with hereditary, nonmalignant diseases. Future efforts will seek to preserve the benefits of elutriation with CD34+ selection by increasing immune ablation of the preparative regimen and/or increasing posttransplant immune suppression.

Weight loss and malnutrition in patients with chronic graft-versus-host disease.

It is well known that weight loss occurs in patients with chronic graft-versus-host disease. However, the severity and frequency of weight loss in this population have not been adequately described. Recent data suggest that a body-mass index (BMI) below 21.9 is an independent risk factor for mortality. In our analysis we have shown that out of 93 patients with cGVHD, 43% are malnourished as evidenced by a BMI less than 21.9 and 14% are severely malnourished (BMI less than 18.5). In addition, there is a clear trend showing that patients with active, ongoing cGVHD have lower BMIs (P = 0.02). Furthermore, we show that many symptoms thought to contribute to weight loss in patients with cGVHD, such as odynophagia and oral sensitivity, are not related to weight loss in our population. We conclude that, in all likelihood, unknown causes still exist that are responsible for weight loss in this group of patients. Elevated resting energy expenditure and elevated serum tumor necrosis factor-alpha are potential contributors to weight loss that will be tested in future studies. We also conclude that treating cGVHD aggressively may help reverse weight loss and malnutrition, which may be independent risk factors for mortality in this population.

Clinical importance of confirming or excluding the diagnosis of chronic graft-versus-host disease.

Chronic graft-versus-host disease (cGVHD) is a major complication of allogeneic hematopoietic cell transplantation. The presentation of this disease is varied, and it requires histological confirmation for diagnosis. In addition, cGVHD can often mimic other diseases, and vice versa. We have conducted a retrospective analysis of 123 patients referred to the GVHD clinic at the Johns Hopkins Oncology Center from 1994 to 1998 with a diagnosis of active cGVHD. Of these, nine patients (7%) had no evidence of cGVHD, and 25 patients (20%) had inactive cGVHD. Many of these patients were found to have other processes accounting for their ongoing symptoms. We conclude that since the therapy for this disease has significant toxicities and since what appears to represent cGVHD may actually be another disease, correct diagnosis of cGVHD or exclusion of this diagnosis is essential.

T cells and natural killer cells regulate human IgG subclass concentrations in SCID mice.

Cytokine regulation of human IgG subclass production is not well understood. Since T cells and natural killer (NK) cells produce IL-4 and/or IFN-gamma, we examined the effect of these cells on human IgG subclass concentration in reconstituted severe combined immunodeficient (SCID) mice. SCID mice receiving only B-cell-enriched splenocyte preparations had significantly decreased IgG concentrations and significantly decreased IgG1/IgG2 ratios compared to mice receiving B cells plus T cells (P = 0.02). IgG2 represented 58% of the total IgG at 28 days in mice receiving B-cell-enriched preparations compared to 19% of the total for the group receiving both B cells and T cells (P = 0.013). The effect of natural killer cells (CD16+) on IgG subclass was also studied in this model. IgG2 concentrations were twofold higher in mice receiving CD16-depleted cells compared to controls (P = 0.004). No significant differences were noted for IgG1, IgG3, or IgG4 subclass concentrations. In conclusion, T cells and natural killer cells influence human IgG subclass regulation in the SCID mouse model. We propose that the regulation of human IgG subclass production can be further examined in the SCID model.