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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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