Hodgkin lymphoma in very young children: Clinical characteristics and outcome of treatment

Presentation of B-cell lymphoma in childhood and adolescence: a systematic review and meta-analysis

BACKGROUND

The diagnosis of B-cell lymphoma, one of the commonest cancers seen in childhood and adolescence, is challenging. There is a crucial need to identify and delineate the prevalence of associated symptoms in order to improve early diagnosis.

AIMS

To identify clinical presentations associated with childhood and adolescent B-cell lymphomas and estimate symptom prevalence.

METHODS

A systematic review of observational studies and meta-analysis of proportions was carried out. Medline and EMBASE were systematically searched, with no language restrictions, from inception to 1st August 2022. Observational studies with at least 10 participants, exploring clinical presentations of any childhood and adolescent lymphoma, were selected. Proportions from each study were inputted to determine the weighted average (pooled) proportion, through random-effects meta-analysis.

RESULTS

Studies reported on symptoms, signs and presentation sites at diagnosis of 12,207 children and adolescents up to the age of 20. Hodgkin's lymphoma most frequently presented with adenopathy in the head-and-neck region (79% [95% CI 58%-91%]), whilst non-Hodgkin's lymphoma presented abdominally (55% [95% CI 43%-68%]). Symptoms associated with lymphoma included cervical lymphadenopathy (48% [95% CI 20%-77%]), peripheral lymphadenopathy (51% [95% CI 37%-66%]), B-symptoms (40% [95% CI 34%-44%]), fever (43% [95% CI 34%-54%]), abdominal mass (46% [95% CI 29%-64%]), weight loss (53% [95% CI 39%-66%]), head-and-neck mass (21% [95% CI 6%-47%]), organomegaly (29% [95% CI 23%-37%]), night sweats (19% [95% CI 10%-32%]), abdominal pain (28% [95% CI 15%-47%]), bone pain (17% [95% CI 10%-28%]) and abnormal neurology (11% [95% CI 3%-28%]).

CONCLUSION

This systematic review and meta-analysis of proportions provides insight into the heterogeneous clinical presentations of B-cell lymphoma in childhood and adolescence and provides estimates of symptom prevalence. This information is likely to increase public and clinical awareness of lymphoma presentations and aid earlier diagnosis. This review further highlights the lack of studies exploring childhood and adolescent lymphoma presentations in primary care, where patients are likely to present at the earliest stages of their disease.

Characterizing age-related differences in Hodgkin lymphoma in children, adolescents and young adults

Current studies describing younger children with Hodgkin lymphoma are limited by geographical region, small sample sizes and variable age groups. Although published data is lacking, there appears to be a trend toward a higher male to female ratio and a higher proportion of mixed cellularity subtype when compared to older cohorts. We performed a retrospective multicenter study utilizing the Pediatric Health Information System® database to evaluate patients aged 0-39 years with Hodgkin lymphoma. We identified 3,034 unique patients who met inclusion criteria. Younger age groups had a larger proportion of males, Hispanic/Latino ethnicity, and mixed cellularity subtype. Treatment-related complications, including mucositis, pain, bacterial infections, and thrombosis, were documented more frequently in older cohorts. We also found significant age-related differences in medical management. This study is the largest study evaluating age-related differences in patients with Hodgkin lymphomaand the first study to evaluate for differences in complicationsand supportive care management.

Hodgkin Lymphoma in Children Under 5 Years: Do They Behave Differently?

The median age of presentation for Hodgkin lymphoma (HL) is lower in developing countries with a higher proportion under 5 years of age possibly attributable to the high prevalence of Epstein-Barr virus-driven disease. It is unclear whether the clinical presentation and outcomes of this cohort are different with concern regarding late effects being most pronounced in this age group. We report the outcome of children under 5 years of age enrolled in the InPOG-HL-15-01, the first multicentric collaborative study for newly diagnosed children and adolescents with HL from India. Thirty-five (9%) of the study population was younger than 5 years with a striking male preponderance of 34:1. They were less likely to have bulky disease, mediastinal or splenic involvement. The outcomes appear to be at least as favorable as in the older patient group. Efforts need to be made to evolve treatment strategies that spare this very young cohort from potential late effects.

Flow cytometry for assessment of the tumor microenvironment in pediatric Hodgkin lymphoma

BACKGROUND

The role of flow cytometry in diagnosis and management of Hodgkin lymphoma (HL) remains limited. As knowledge emerges of the tumor microenvironment in this disease, various methods are being evaluated in its study. This study examines the microenvironment using flow cytometry to assess differences between subtypes and clinicopathologic correlates.

PROCEDURE

A retrospective cross-sectional study was performed analyzing the tumor immunophenotype, by flow cytometry, for 31 children with classical HL. Correlation was made with patient information, including outcome.

RESULTS

The makeup of the tumor microenvironment varies across subtype of HL, with T cells predominating in nodular sclerosis (NS), and similar proportions of B and T cells in mixed cellularity (MC). CD4 cells predominate in NS, whereas CD8 more so in MC subtype. The rate of continuous complete remission is significantly higher in the MC subgroup. Last, the proportion of HLA-DR/CD38 copositive lymphocytes was an independent prognostic factor for relapse/refractoriness.

CONCLUSIONS

This study indicates that flow cytometry can be used to examine the tumor microenvironment in HL and that percentage of HLA-DR/CD38 copositive lymphocytes may be a biomarker for relapse and refractoriness in pediatric HL.

A rare presentation of Hodgkin's lymphoma in a very young child, with involvement of the appendix

Hodgkin's lymphoma involving the appendix in young children is an exceptionally rare disease. We report a case of a child less than 3 years who presented to us with gradual weight loss, progressive pallor and diffuse abdominal pain. The symptoms were preceded by a history of varicella infection about 6 months ago. The clinical progression was marked by intermittent episodes of acute abdominal pain and fever, mimicking acute intra-abdominal inflammatory process such as appendicitis. Investigations revealed that the child had direct Coomb's test positive haemolytic anaemia, raised platelet counts, lymphopenia and hypergammaglobulinaemia. The CT of the abdomen showed the presence of significant lymph nodes. Abdominal laparoscopy and biopsy of the lymph nodes showed mixed cellularity Hodgkin's lymphoma that also involved the appendix. Subsequent staging detected an advanced stage IV disease. The child was referred immediately to a specialised oncology centre for further management. Unfortunately he was lost in follow-up.

Differences between younger and older patients with childhood hodgkin lymphoma

From 1979 to 2006, 74 children with Hodgkin's lymphoma were treated at our center. Among them, 15 (14 boys and 1 girl) and 59 (33 boys and 26 girls) patients were younger and older than 8 years, respectively. Six (40%) children among younger patients and 26 (44%) among older patients had advanced stage disease. We detected 3 (20%) relapses among younger patients and 5 (8.5%) among the older patients. All of younger patients are alive whereas three of the older patients have died. Second malignancy developed in one and three children among younger and older patients, respectively. The only difference that was detected concerning the age was a male predominance among the younger patients.

Hodgkin lymphoma in Africa: present and future

Hodgkin lymphoma (HL) was described for the first time in 1832 by Sir Thomas Hodgkin, who is considered the father of the disease. This lymphoma occupies a special place among childhood malignancies, due to its high rate of cure. HL is described as one of the most common haematological malignancies in African children. Despite high rates of survival achieved in resource rich countries, the outcome in Africa is not as rewarding as many challenges are encountered. This paper reviews published African studies on childhood HL in order to delineate the amplitude of this health problem and its African specifics, in the quest for effective ways to improve the outcome of the children diagnosed with this disease.

Epidemiology of classical Hodgkin lymphoma and its association with Epstein Barr virus in Northern China

Background

The incidence of classical Hodgkin lymphoma (cHL) and its association with Epstein-Barr virus (EBV) varies significantly with age, sex, ethnicity and geographic location. This is the first report on epidemiological features of cHL patients from Northern regions of China. These features are compared to data from a previously published Dutch cHL population.

Methodology/Principal Findings

157 cHL patients diagnosed between 1997 and 2008 in the North of China were included after histopathological re-evaluation. The Dutch population-based cohort consisted of 515 cHL patients diagnosed between 1987 and 2000. EBV status was determined by in situ hybridization of EBV- encoded small RNAs. In the Chinese population, tumor cells of 39% of the cHL patients were EBV+ and this was significantly associated with male sex, mixed cellularity subtype and young age (<20 y). The median age of the Chinese patients was 9 years younger than that of the Dutch patients (28 y vs. 37 y). In addition, the age distribution between the two populations was strikingly different in both the EBV+ subgroups (p<0.001) and the EBV- subgroups (p = 0.01). The mixed cellularity subtype was almost 3x more frequent amongst the Chinese (p<0.001).

Conclusion/Significance

CHL patients from Northern regions of China show a distinctive age distribution pattern with a striking incidence peak of EBV+ mixed cellularity cases among children and adolescents and another high incidence peak of EBV- nodular sclerosis cases in young adults. In comparison to Dutch cHL patients there are pronounced differences in age distribution, subtype and EBV status, presumably caused by complex gene-environmental interactions.

Pediatric lymphoma: a 10-year experience at a tertiary care hospital in Pakistan

Lymphoma is the third most common childhood malignancy. Less information is available on this disease and its outcome from our country. We present here a single institute experience. A retrospective study was carried out at Aga Khan University Hospital, Karachi on children (<15 y) diagnosed with lymphoma from 1998 to 2007. Sixty-eight patients were identified. Fifty-one children were diagnosed as non-Hodgkin lymphoma (NHL). Mean age of presentation was 8.4 years with male-to-female ratio of 5.8 : 1. Most common histopathologic subtype of NHL was Burkitt lymphoma (55%). Abdominal mass was the main presenting feature of Burkitt and diffuse large B cell lymphoma. T-lymphoblastic lymphoma presented mainly as mediastinal mass. Ten children died, 4 secondary to tumor lysis syndrome, 5 because of disease progression, and 1 with chemotherapy-induced toxicity. One-third of the patients left without treatment. Seventeen children were diagnosed as Hodgkin lymphoma with mixed cellularity as the commonest subtype (65%). Overall survival of children with NHL and Hodgkin lymphoma was 62% and 94%, respectively. A greater proportion of NHL, advanced stage, and profound male preponderance were observed. Improvement in survival can only be achieved with increasing awareness, identifying and tackling causes of abandonment, early referral, and better supportive care.

Pediatric lymphomas in Brazil

OBJECTIVE

This study provides the clinical pathological characteristics of 1301 cases of pediatric/adolescent lymphomas in patients from different geographic regions of Brazil.

METHODS

A retrospective analyses of diagnosed pediatric lymphoma cases in a 10-year period was performed. We believe that it represents the largest series of pediatric lymphomas presented from Brazil.

RESULTS

Non-Hodgkin lymphomas represented 68% of the cases, including those of precursor (36%) and mature (64%) cell origin. Mature cell lymphomas comprised 81% of the B-cell phenotype and 19% of the T-cell phenotype. Hodgkin lymphomas represented 32% of all cases, including 87% of the classical type and 13% of nodular lymphocyte predominant type. The geographic distribution showed 38.4% of the cases in the Southeast region, 28.7% in the Northeast, 16.1% in the South, 8.8% in the North, and 8% in the Central-west region. The distribution by age groups was 15-18 years old, 33%; 11-14 years old, 26%; 6-10 years old, 24%; and 6 years old or younger, 17%. Among mature B-cell lymphomas, most of the cases were Burkitt lymphomas (65%), followed by diffuse large B-cell lymphomas (24%). In the mature T-cell group, anaplastic large cell lymphoma, ALK-positive was the most prevalent (57%), followed by peripheral T-cell lymphoma, then not otherwise specified (25%). In the group of classic Hodgkin lymphomas, the main histological subtype was nodular sclerosis (76%). Nodular lymphocyte predominance occurred more frequently than in other series.

CONCLUSION

Some of the results found in this study may reflect the heterogeneous socioeconomical status and environmental factors of the Brazilian population in different regions.

How much does it cost to treat children with Hodgkin lymphoma in Africa?

Hodgkin lymphoma (HL) is a common B-cell childhood neoplasm and it has a higher incidence in the 0-14 year age group in developing countries compared to developed countries. Treatment achieves a cure rate of about 80%. In African countries with a small gross domestic product per capita the cost of treating HL in children may be prohibitive. To determine the direct costs of treatment of HL in South Africa and to propose a more cost-effective approach to investigation and treatment for children diagnosed with HL in Africa, tumor registry data for 138 children with HL from two South African hospitals were analysed retrospectively. The cost of treatment for stage 2 disease was calculated, including investigations and chemotherapy. The analysis included the cost of a follow-up period of 2 years. Stage 2 was the most common stage seen, and ABVD protocol was the most common protocol used. The total cost of diagnosing, staging, treating with chemotherapy and following up a child with stage 2 HL for 2 years post-therapy was ZAR 53178.20 = USD 6647.27 = EUR 4431.51. Follow-up expenditure was much higher than initial chemotherapy costs. The major factors driving the cost for the whole group of 138 patients were as follows: stage, radiologic imaging, radiotherapy, second-line chemotherapy, hospitalisation and febrile neutropenia. The total cost of treatment of HL is affordable for first world countries, but it remains expensive for developing countries, especially in Africa where the GDP is often under USD 2000 per head. Early diagnosis, use of less toxic protocols such as ABVD, close monitoring to prevent complications and elimination of unnecessary tests and investigations may reduce the overall cost.