Lymphoid malignancy Flashcards

1
Q

Features of lymphoma?

A
  • Can present with enlarged lymph nodes (lymphadenopathy)
  • with extranodal involvement
  • with bone marrow involvement
  • Weight loss (> 10% in 6 months), fever, night sweats, pruritis, fatigue
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2
Q

How many types of lymphoma are there?

How can we tell what type?

A
  • > 50 different disease entities, defined by the malignant cell characteristics
  • Biopsy (e.g. lymph node, bone marrow) tells us what type it is
  • Clinical examination and imaging (e.g. CT) tell us where it is, not what it is
  • Lymphoma vs leukaemia – bone marrow involvement
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3
Q

What are the main lymphoproliferative disorders?

A
  • Acute lymphoblastic leukaemia (ALL)
  • Chronic lymphocytic leukaemia (CLL)
  • Hodgkin lymphoma
  • Non-Hodgkin lymphoma (NHL)
    • High-grade
    • Low-grade
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4
Q

What is Acute lymphoblastic leukaemia (ALL)?

A
  • Neoplastic disorder of lymphoblasts
  • Diagnosed by > 20% lymphoblasts present in bone marrow
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5
Q

Epidemiology of ALL?

A
  • Incidence 1-2/100,000 population/year
  • 75% cases occur in children < 6 years
  • 75-90% cases are of B-cell lineage
  • Present with 2-3 week history of bone marrow failure or bone/joint pain
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6
Q

What would common findings on bloods be for ALL?

A
  • Haemoglobin 38 g/L (120-140)
  • White cell count 370 x 109/L (4-11)
  • Platelets 68 x 109/L (150-400)
  • Bone marrow 90% B-lymphoblasts
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7
Q

What is the treatment of ALL?

A
  • Standard treatment
    • Induction chemotherapy to obtain remission
    • Consolidation therapy
    • CNS directed treatment
    • Maintenance treatment for 18 months
  • Stem cell transplantation (if high risk)
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8
Q

What are poor RF for ALL?

A
  • Increasing age
  • Increased white cell count
  • Immunophenotype (more primitive forms)
  • Cytogenetics/molecular genetics
    • t(9;22); t(4;11)
  • Slow/poor response to treatment
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9
Q

What are the likely outcomes for ALL?

A
  • Adults with ALL
    • complete remission rate 78–91%
    • leukaemia-free survival at 5y 30–35%
  • Children with ALL
    • 5y overall survival ~90%
    • Poor risk patients (slow response to induction or Philadelphia positive) 5y OS 45%
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10
Q

ALL useful info:

A
  • Typical presentation:
    • Bone marrow failure +/- raised white cell count
    • Bone pain, infection, sweats
  • Treated with multi-agent intensive chemotherapy +/- allogeneic stem cell transplant
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11
Q

How do we make a diagnosis of CLL?

A

Chronic lymphocytic leukaemia

  • Blood > 5 x 109/L lymphocytes
  • Bone marrow > 30% lymphocytes
  • Characteristic immunophenotyping
    • B-cell markers (CD 19, 20, 23) & CD5 positive
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12
Q

CLL incidence?

A
  • Commonest leukaemia worldwide
  • 2 males: 1 female
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13
Q

How does CLL present?

A
  • Often assymptomatic at presentation
  • Frequent findings:
    • Bone marrow failure (anaemia, thrombocytopenia)
    • Lymphadenopathy
    • Splenomegaly (30%)
    • Fever and sweats (< 25%)
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14
Q

What is the staging system for CLL?

A

Binet

A. <3 lymph node areas, survival same as matched controls

B. 3 or more lymph node areas, survival 8 yrs

C. Stage B + anaemia or thrombocytopenia, survival 6 yrs

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15
Q

What are indications for treatment in CLL?

A
  • Progressive bone marrow failure
  • Massive lymphadenopathy
  • Progressive splenomegaly
  • Lymphocyte doubling time <6 months or >50% increase over 2 months
  • Systemic symptoms
  • Autoimmune cytopenias
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16
Q

How can we treat CLL?

A
  • Often nothing – “watch and wait” - 50% patients receive chemo, 50% receive no treatment
  • Cytotoxic chemotherapy e.g. fludarabine, bendamustine
  • Monoclonal antibodies e.g. Rituximab, obinutuzamab
17
Q

What are poor prognostic factors for CLL?

A
  • Advanced disease (Binet stage B or C)
  • Atypical lymphocyte morphology
  • Rapid lymphocyte doubling time (<12 mth)
  • CD38+ expression
18
Q

How does lymphoma present?

A
  • lymphadenopathy/hepatosplenomegaly
  • Extranodal disease
  • “B symptoms”
  • bone marrow involvement
19
Q

How do we stage lymphoma?

A
  • lymph node biopsy/ CT scan/ bone marrow aspirate and trephine
20
Q

How do we stage lymphoma?

A
21
Q

Non-Hodgkin lymphoma

How are they classified?

A
  • lineage (B-cell or T-cell)
  • Majority are B-cell in origin
  • grade of disease (high grade or low grade)
  • histological features of disease
22
Q

How are Non-Hodgkin lymphoma graded?

A
  • Low grade lymphoma
    • Indolent, often asymptomatic
    • responds to chemotherapy but incurable
    • median survival varies by subtype
  • High grade lymphoma
    • Aggressive, fast-growing
    • Require combination chemotherapy
    • Can be cured, but again varies widely
23
Q

What are a couple of specific disease entities of NHL?

A
  • Diffuse Large B cell lymphoma
  • Follicular lymphoma
24
Q

Features of diffuse large B cell lymphoma?

A
  • Commonest subtype of lymphoma (of any kind)
  • High-grade lymphomaa
25
Q

Features of follicular lymphoma?

A
  • 2nd commonest subtype of lymphoma
  • Low-grade lymphoma
26
Q

How are diffuse large b cell and follicular lymphoma treated?

A
  • Both are treated with combination chemotherapy – typically anti-CD20 monoclonal antibody + chemo
27
Q

Brief epidemiology of Hodgkin Lymphoma?

A
  • 30% of all lymphomas
  • bimodal age curve:
    • 1st peak at 15-35y
    • 2nd peak later in life
  • •1.9 males: 1 female
  • association with Epstein Barr virus; familial and geographical clustering
28
Q

What is the treatment of Hodgkin lymphoma?

A
  • Combination chemotherapy (ABVD)
    • +/- radiotherapy
  • Monoclonal antibodies (anti-CD30)
  • Immunotherapy (checkpoint inhibitors)
  • Use of PET scan to assess response to treatment and to limit use of radiotherapy