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Familial Aggregation of Non-Hodgkin's Lymphoma (NHL). A Case Report
Hereditary Cancer in Clinical Practice volume 4, Article number: 136 (2006)
A family is reported in which three male siblings of Asian descent developed non-Hodgkin's lymphoma (NHL). Case 1 was diagnosed with indolent follicular lymphoma stage IIIA at age 45. Case 2 presented with large B-cell lymphoma stage IIB at age 56. Chromosomal investigation of the peripheral blood did not show abnormalities. Chemotherapy induced a complete remission. However, after a period of nearly ten years he developed acute myeloid leukaemia. Case 3 developed large B-cell lymphoma stage IVA at age 52. Cytogenetic analysis in peripheral blood was normal. Shared genetic and environmental risk factors remain to be identified in this family. Familial aggregation of NHL is uncommon. In some families, various forms of immunodeficiency have been found. In addition to coincidental clustering of cases, and rare cases explained by known tumour syndromes such as Li-Fraumeni (like) syndrome, other familial cases may share as yet unknown genetic and/or environmental risk factors.
In Western countries there has been a large and mainly unexplained rise in incidence of non-Hodgkin's lymphoma (NHL) in recent years . Several aetiological factors for NHL are known, including genetic and environmental or occupational factors. Familial aggregation of lymphoproliferative malignancies (malignant lymphoma and lymphatic leukaemia) has been reported repeatedly but accounts for only a small proportion of lymphoma cases. Most of the familial cases are sibling pairs either alone or in combination with other affected relatives. A population-based study in Israel among first-degree relatives of patients with lymphomas showed that only 0.7% of the lymphoma patients had a history of lymphoma in one or more relatives . In some families, a pre-existing immune deficiency has been described [3–5]. No histological subtype appears to predominate in familial cases.
Here, a family in which all three living male siblings of Asian descent developed NHL is presented.
This patient was born in 1936 in East Java (Indonesia), as were his three younger brothers. His father worked as a tea planter and died in 1944 at age 38 in a prisoner-of-war camp. A younger brother also died in a prisoner-of-war camp at age 6. In East Java there was no overt pollution. In 1957 the remaining three brothers and their healthy mother emigrated to the Netherlands. The patient worked as a technical chemist. He smoked forty pack years and had always been healthy until 1981 when follicular lymphoma stage IIIA was diagnosed at age 45. He was treated with twelve cycles of COP (cyclophosphamide, oncovin and prednisone). In 1994 he developed a relapse of his indolent lymphoma with mediastinal and abdominal localization for which again COP chemotherapy was given. In 1997 a second relapse of his lymphoma with mediastinal localization was noted. Once more the COP regimen was started which induced a complete remission. At present he is well without evidence of recurrent lymphoma.
The second living brother was born in 1937. In the Netherlands he worked as a construction fitter visiting several factories. He also smoked (approximately twelve pack years) and had always been healthy until December 1993 when at age 56 diffuse large B-cell lymphoma (DLBCL) was diagnosed, stage II A with localizations in the axilla, cervical region and nasopharynx. Primary treatment consisted of six cycles of CHOP (cyclophosphamide, oncovin, adriamycine and prednisone), which resulted in a complete remission. No additional therapy was given. In July 2003 he presented with weight loss, fever and enlarged cervical glands. Acute myeloid leukaemia was diagnosed. The leukaemia was treated with daunorubicine and cytarabine followed by a course of high-dose cytarabine. After an initial response a relapse of his leukaemia occurred in July 2004. At the moment he is being treated on an experimental basis. Chromosomal investigation in peripheral blood has been performed without finding any abnormalities.
The third living brother was born in 1942. As a technician he worked with acids, alkalis, cyanide and metals. He smoked eight pack years and was well until March 2004 when DLBCL stage IVA was diagnosed with paravertebral localization and myelum compression causing neurological symptoms. There was also bone marrow involvement. He was treated initially with CHOP chemotherapy, in total eight cycles, followed by rituximab infusions, four cycles. He responded very well. CT-scan showed a complete regression of the paravertebral mass. Bone marrow biopsy, however, revealed a sporadic focus of lymphoma. Chromosomal investigation of the peripheral blood did not show abnormalities.
Unfortunately, three months after completion of the therapy he developed a relapse with cervical and retroperitoneal localizations. Simultaneously he was diagnosed with right-sided oculomotor nerve palsy. Neurological examination, including CT and MRI of the brain, did not reveal meningeal involvement but the cerebrospinal fluid was positive for lymphoma cells. He was referred for further second-line chemotherapy.
The family history was unremarkable for other types of cancer and did not meet clinical criteria for Li-Fraumeni syndrome or any of the other known human tumour syndromes. There were no symptoms to suggest immunodeficiency in this family.
Risk of NHL has been found significantly increased in relatives of people with haematological malignancies, especially among siblings, although the absolute risk is small [2, 6, 7]. It has been estimated that the absolute lifetime risk for a first-degree relative of an NHL case of developing NHL is 3.6% (compared with a population risk of 2.1%) and higher if the index case had an aggressive subtype of NHL . Aggregation of NHL seems to be stronger for siblings and for male relatives and among relatives of early-onset (<50 years) NHL cases . With the exception of chronic lymphocytic leukaemia and indolent lymphoma, most affected families present with diverse lymphoproliferative and other haematological malignancies . This diversity is not completely unexpected as lymphoma and leukaemia have common cellular origins, and some types have common genetic somatic changes or share common aetiological factors. Histological subtypes do appear to have an effect on familial risk. A recent study using the Swedish Family-Cancer Database calculated standardized incidence ratios (SIRs) for histopathology-specific subtypes of NHL in offspring with NHL whose parents or siblings were affected with different types of lymphoproliferative malignancies. A family history of NHL significantly increased the risk for NHL (SIRparent = 1.8; SIRsibling = 1.9) and for diffuse large B-cell lymphoma (SIRparent = 2.3), follicular lymphoma (SIRsibling = 2.3), and B-cell lymphoma not otherwise specified (NOS) (SIRsibling = 3.4). For a parental history of histopathology-specific concordant cancer, the risks were significantly increased for diffuse large B-cell lymphoma (SIR = 11.8), follicular NHL (SIR = 6.1), plasma cell myeloma (SIR = 2.5), and chronic lymphocytic leukaemia (SIR = 5.9) .
In general, familial aggregation of lymphoproliferative malignancies may be coincidental or may be caused by (combinations of) shared genetic and environmental risk factors. In rare cases, familial aggregation is associated with rare hereditary tumour syndromes such as Li-Fraumeni syndrome or hereditary immunodeficiency syndromes. Apart from those cases occurring in families meeting the criteria of Li-Fraumeni (like) syndrome, constitutional p53 mutations are rare in cases of familial aggregation of lymphoma . Some multiple-case families have been found to have various types of immune deficiency disorders [3, 4]. The immunological disorders range from X-linked lymphoproliferative syndrome and ataxia telangiectasia to subtle laboratory findings like a disturbance in T cell function, decreased T cell number, or increased immunoglobulins. In other families risk factors are unclear. An argument in favour of genetic predisposition playing a role is the fact that various investigators have demonstrated that anticipation is present in familial NHL [13, 14]. Anticipation is a phenomenon characterised by an increase in severity of clinical symptoms or a decrease in the age of onset in successive generations. A possible non-genetic explanation is that the parents and children have been simultaneously exposed to a causative environmental agent, the difference in age of onset reflecting the generational difference. However, this does not explain cases in families who did not live together and cases where parents were diagnosed with NHL many years after their children were.
A population-based case-control study in the United States showed that certain non-genetic risk factors, including exposure to a chlorinated hydrocarbon pesticide, plywood, fibreboard or particleboard and history of liver diseases (other than hepatitis or cirrhosis) (OR = 6.5, 95% CI: 1.2-36.2), increased the risk of NHL in patients with a family history of haematological malignancies compared to patients without such family history . Another study could not confirm that a family history of cancer modifies the association of agricultural exposures with NHL  and a more recent study showed no evidence that aetiological associations varied between familial NHL and nonfamilial NHL cases . In general, it is therefore still difficult to pinpoint interactions between shared inherited and environmental risk factors with respect to NHL development.
In the present family, no signs of impaired immunity were present; however, neither cancer predisposing germline gene mutations nor exposure to viruses or environmental carcinogens can be excluded. All three affected brothers may have been exposed to possible carcinogenic materials during work, and all three were smokers. Tobacco use has been suggested to increase the risk of NHL, but the results of epidemiological studies have been inconsistent . The combined effects of genetic susceptibility and tobacco use could possibly lead to NHL. At diagnosis, one brother had indolent lymphoma and two had aggressive lymphoma of follicle centre cell origin. It is possible that this was a transformed lymphoma, which originated also from an indolent lymphoma, but this could not be substantiated by available clinical and morphological data. The leukaemia of case 2 could have been secondary to chemotherapy or could have been a second primary haematological malignancy, which would then again suggest possible predisposition.
In conclusion: in this case report we have presented a quite remarkable clinical finding in three male siblings who developed malignant lymphoma. All of them are still alive. Shared genetic or environmental risk factors, or combinations of these, remain to be identified in this family.
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The authors thank B.P.M. Imholz, MD, PhD, for providing medical information on Case 1.
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Loves, S.S., de Haan, L. & Daenen, S.M. Familial Aggregation of Non-Hodgkin's Lymphoma (NHL). A Case Report. Hered Cancer Clin Pract 4, 136 (2006). https://doi.org/10.1186/1897-4287-4-3-136
- non-Hodgkin's lymphoma
- familial lymphoma
- haematological cancer
- genetic susceptibility
- risk factors