Non-Hodgkin's Lymphoma (NHL) Flashcards
What is Non-Hodgkin’s lymphoma?
A heterogeneous group of malignancies of the lymphoid system.
NHL is a disease of the immune system.
Which autoimmune disorders is NHL linked to?
Sjogren’s syndrome
Rheumatoid arthritis
SLE
Coeliac disease
Pathophysiology of NHL
Multi-step accumulation of genetic aberrations that confer a growth advantage and expansion of a monoclonal population of malignant lymphocytes.
Classification of NHL
Aggressive B-cell lymphomas
Aggressive T-cell lymphomas
Indolent B-cell lymphomas
Indolent T-cell lymphomas
Sub-types of aggressive B-cell lymphomas
DLBCL Mediastinal large B cell Primary CNS (95% are DLBCL) Primary effusion lymphoma/early cavity lymphoma Burkitt's and Burkitt-like Mantle cell
Sub-types of aggressive T-cell lymphomas
Enteropathy-type T-cell lymphoma/interstitial T-cell lymphoma Peripheral T-cell lymphoma Subcutaneous panniculitis-like Systemic anaplastic Angioimmunoblastic
Sub-types of indolent B-cell lymphomas
Follicular lymphoma
Marginal zone, gastric MALT-type
Sub-types of indolent T-cell lymphomas
Mycosis fungoides/ Sezary syndrome
Primary cutaneous anaplastic large cell lymphoma
Signs and symptoms of NHL
Clinical Hx depends on the type of lymphoma and the stage of presentation. - Aggressive lymphoma present with systemic symptoms like: Fever Weight loss (hypermetabolic state) SOB (pleural or lung) Drenching night sweats Malaise Abdominal discomfort (hepatomegaly, splenomegaly, lymphadenopathy) Dizziness Ataxia (CNS involvement) Fatigue (anaemia) Cough (mediastinal mass/lymphadenopathy) Bone and back pain -Signs may include: Lymphadenopathy Pallor (anaemia) Jaundice (liver failure) Skin nodules Hepatomegaly Splenomegaly Purpura (thrombocytopenia) Abnormal neurological exam
Risk factors for NHL
Age > 50 years Male sex Immunocomprised host EBV Human T-lymphocytotrophic virus-1 (HTLV-1) H.pylori Coeliac disease HIV HCV Sjögren’s syndrome Ataxia-telenglektasia Wiskott-Aldrich syndrome
Investigations of NHL
FBC with differential (thrombocytopenia) Blood smear (nucleated RBCs) Lymph node biopsy (positive) Skin biopsy (positive) Bone marrow biopsy (positive) LFTs (elevated) LDH (elevated)
Differentials of NHL
Hodgkin's lymphoma Acute lymphocytic leukaemia Infectious mononucleosis HCV Sarcoidosis Rheumatoid arthritis CMV TB HIV Syphillis SLE
Which staging system is used to stage NHL?
Modified Ann Arbor Staging System for NHL
I: Single lymph node group
II: Multiple lymph node groups on the same side of the diaphragm
III: Multiple lymph node groups on both sides of the diaphragm
IV: Multiple extranodal sites or lymph nodes and extranodal disease (an X denotes extranodal disease bulk >10 cm)
E: Extranodal extension or single isolated site of extranodal disease
B symptoms: weight loss >10%, fever, and drenching night sweats.
Management of NHL
Huge range of options, depending on disease subtype
Treatment of low-grade NHL
If symptomless, none may be needed
Radiotherapy may be curative in localised disease
Chlorambucil is used in diffuse disease
Remission may be maintained by using interferon alfa or rituximab.