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Non-Hodgkin Lymphoma

6

 

Paul Imbach

 

Contents

 

6.1

Definition .......................................................................................................................

54

6.2

Incidence ........................................................................................................................

54

6.3

Etiology, Pathogenesis, and Molecular Genetics ...........................................................

54

6.4

Pathology and Classification..........................................................................................

55

6.5Histological, Immunological, and Cytogenetic Characteristics

of the Different Forms of NHL ......................................................................................

55

6.5.1 Burkitt Lymphoma (BL) and Burkitt Like Lymphoma (BLL) ........................

55

6.5.2 Large B-Cell Lymphoma (LBCL)....................................................................

56

6.5.3

Lymphoblastic Lymphoma (LL) ......................................................................

56

6.5.4 Anaplastic Large Cell Lymphoma (ALCL) .....................................................

56

6.5.5

Unclassifiable NHL..........................................................................................

57

6.6 Clinical Manifestations ..................................................................................................

57

6.6.1

General Symptoms...........................................................................................

57

6.6.2 Symptoms in Relation to Location of NHL.....................................................

57

6.7Differential Diagnosis Among the Different Forms of NHL

 

(In Ranking of Frequency).............................................................................................

58

 

6.7.1 Differential Diagnosis of Other Disorders .......................................................

58

6.8

Diagnosis........................................................................................................................

59

 

6.8.1

Risk-Adapted Diagnostic Procedure................................................................

59

 

6.8.2

Radiological Diagnosis ....................................................................................

59

6.9 Staging (Murphy, St. Jude).............................................................................................

59

 

6.9.1

Frequency.........................................................................................................

60

6.10

Therapy

..........................................................................................................................

60

 

6.10.1 Therapy and Prognosis of BL, BLL, and LBCL..............................................

60

 

6.10.2 Therapy and Prognosis of LL...........................................................................

61

 

6.10.3 Therapy and Prognosis of ALCL.....................................................................

61

6.11

Novel Immunologic Treatment ......................................................................................

61

6.12

Patients with Partial Response or with Relapse of NHL................................................

61

P. Imbach et al. (eds.), Pediatric Oncology,

53

DOI 10.1007/978-3-642-20359-6_6, © Springer-Verlag Berlin Heidelberg 2011

 

54

P. Imbach

 

 

6.1Definition

Neoplasia of the lymphatic system and its precursor cells, with genetically disturbed regulation of proliferation, differentiation, and apoptosis

Morphologically and cytogenetically heterogeneous disorders with difficult, variable classification

If marked bone marrow involvement is present the clinical condition is equal to that of leukemia

6.2Incidence

Five percent of all neoplasias in childhood

A ratio of 7:1 million children less than the age of 16 years who are newly diagnosed annually

Peak incidence between 5 and 15 years, rarely before the age of 2 years; in adulthood, higher frequency with progressive age

Ratio of male to female is 2:1

Occasional familial occurrence

Worldwide variable regional incidence depends on type of lymphoma

Africa: endemic form, 10 in 100,000 children, Burkitt Lymphoma; sporadic form, 0.2–0.4 in 100,000 children

Europe and USA: sporadic form only

6.3Etiology, Pathogenesis, and Molecular Genetics

Unknown etiology in humans

Genetics: often chromosomal alterations are detectable

In BL, translocation of chromosome 14: t(18:14), the gene location for immunoglobulin production; in addition dysregulation via translocation of c-MYC oncogene

In lymphoblastic lymphoma there are many genetic abnormalities and in large all lymphoma mostly t(2;5): see details below

Predisposing factors for non-Hodgkin lymphoma (NHL) in the following disorders:

Acquired immunodeficiency: autoimmune disorders, HIV infection

Epstein–Barr virus infection: endemic BL, lymphoproliferative syndrome

Congenital B-cell defect: X-chromosomal agammaglobulinemia, selective IgA/M deficiency

Congenital T-cell defect with thymus hyperplasia

Bloom syndrome, Chédiak–Higashi syndrome, congenital B- and T-cell defects: severe combined immune deficiency (SCID), ataxia telangiectasia, Wiskott– Aldrich syndrome, common variable immune deficiency (CVID)

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