human anatomy and physiologyolli.fullerton.edu/_resources/pdfs/csuf-cancer-lecture4...
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LECTURE #4
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LYMPHATIC SYSTEM
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T-lymphocytes (activated in the thymus) identify
aggressors and try to destroy them through the
production of lymphokines (synthesized proteins)
• Killer T-cells
• Helper T-cells
• Suppressor cells
CELL-MEDIATED IMMUNITY
E. MORAN - 2017 3
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B-lymphocytes (from the bone marrow) synthesize
immunoglobulins which function as antibodies
combining with foreign antigens (bacteria and
viruses):
IgG – major immunoglobulin (80%)
IgM – mostly intravascular
IgA – in body secretions, GI and respiratory tract
IgE – active in hypersensitivity (allergy)
IgD
HUMORAL IMMUNITY
E. MORAN - 2017 4
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E. MORAN - 2017 5
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• Obstruction to the lymph flow ➢ Edema
• Draining infected areas ➢ Lymphadenitis
• Cancer: Lymphomas, Hodgkin’s disease, Leukemia
DISEASES OF THE LYMPHATIC SYSTEM
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Hodgkin’s disease
Lymphomas
Leukemias
Multiple myeloma
Carcinomas and sarcomas
Inherited or acquired primary immunodeficiency disease
DISEASES THAT COMPROMISE THE HOST DEFENCE MECHANISM
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LYMPH NODE STRUCTURE - SCHEMA
E. MORAN 2018
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E. MORAN - 2018 9
LUNGS Lymph nodes, Adrenal glands, Bones, Liver, Brain
BREAST Lymph glands, Lungs, Liver, Bones, Brain
PROSTATE Lymph glands, Spine, Bones, Lungs
COLON Lymph glands, Liver, Lungs
BRAIN - Rarely to lymph nodes
PREFERENTIAL SITES OF CANCER SPREAD
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E. MORAN - 2018 10
Intra-thoracic organs drain mostly to the right
cervical and supraclavicular lymph nodes.
Intra-abdominal organs drain mostly to the left
cervical and supraclavicular lymph nodes
Lymphatic Spread of Cancer
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Subjective: tender or painless
Objective: Acute or chronic
Local or general
Isolated or matted glands
Differential diagnosis: Chronic infections
Cancer
Diagnosis: Biopsy and pathologic examination
No needle biopsy
ENLARGED GLANDS(LYMPHADENOPATHY)
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E. MORAN - 2018 12
Left cervical lymphadenopathy
(Enlarged lymph nodes) – Chronic
lymphatic leukemia (CLL)
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Right Cervical (Neck) Enlarged Lymph
Nodes - Lymphoma
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Swollen glands – Hodgkin’s disease
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Burkitt’s lymphoma
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E. MORAN - 2018
Relapse of “Testicular Cancer”On pathology review: Large cell lymphoma
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E. MORAN - 2018
Use of Gallium67 scan in Hodgkin’s disease
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High-grade lymphoma involving the floor of the mouth
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HIGH-GRADE LYMPHOMA OF THE LT. TONSIL
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Liver scan with focal areas of involvement
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Abdominal CT Scan of a Patient with Lymphoma
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E. MORAN - 2018 22
Physical examination
Laboratory profile
CT or PET–CT scan
Other tests as indicated by the presentation
EVALUATION OF HODGKIN’S DISEASE AND LYMPHOMA
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Classified by their rate of proliferation:
• Low-grade
• Intermediate grade
• Hi-grade
LYMPHOMAS OTHER THAN HODGKIN’S DISEASE
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Low-grade (Indolent) lymphomas:
Observation
Chemotherapy at time of progression +/-Radiation
High-grade (aggressive) lymphomas:
Chemotherapy
Bone marrow transplantation
Multiple myeloma: Chemotherapy + BMT
TREATMENT OF LYMPHOMAS
E. MORAN - 2015 24
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CANCER of BLOOD FORMING
ORGANS
LEUKEMIA
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Active (Normal) Bone Marrow
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Active (Normal) Bone Marrow
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E. MORAN - 2018 28
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Stem Cell and Blood Cells
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Blood film (smear) to show: Red blood cells, white blood cells
(neutrophils), and a platelet
E. MORAN - 2018 30
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RBC 120 days
WBC 8.5 -14 days
Platelets ~ one week
LIFETIME OF BLOOD CELLS
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Homeostasis of the White Blood Cells
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E. MORAN - 2018 33
Leukemia – Microscopic view of the bone marrow
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E. MORAN - 2018 34
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Clinically:
Acute leukemia: Acute course, with bleeding, infections
Chronic leukemia: Course is chronic - years
Microscopically:
Acute: Primitive bone marrow cells in the bone marrow and in the blood
Chronic: Relatively differentiated bone marrow cells in the blood
ACUTE VS. CHRONIC LEUKEMIA
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US 2015 Est. new cases 54,270
Acute lymphocytic leukemia 6,250
Chronic lymphocytic leukemia 14,620
Acute myeloid leukemia 20,830
Chronic myeloid leukemia 6,660
Other leukemias 5,910
LEUKEMIA BURDEN OF SUFFERING
E. MORAN - 2018 37
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• Genetic factors
• Viral infection
• Radiation exposure
• Chemicals exposure
ACUTE LEUKEMIAETIOLOGY
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Chromosome imbalance: Down’s syndrome
Other aneuploidies
Chromosome breakage: Bloom’s syndrome
Fanconi’s syndrome
Ataxia telangiectasia
Genetic “susceptibility”: Familial (?)
Coexistent neoplasm (?)
ACUTE LEUKEMIA - ETIOLOGYGENETIC FACTORS
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In animals: Experimental evidence
In humans: Viruses and virus-like particles in leukemic cells and plasma of patients
• Are viruses bystanders?
• Are viruses co-carcinogens?
• Koch’s postulate not fulfilled
ACUTE LEUKEMIA ETIOLOGYVIRAL LEUKEMOGENESIS
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In the general population:
• Survivors of the atomic bomb explosions (Japan, 1945)
• Radiologists exposed to ionizing radiation
In patients treated for other diseases:
• Ankylosing spondylitis• Thymus radiation in childhood• Diagnostic tests: Unknown dose threshold
ACUTE LEUKEMIA - ETIOLOGYRADIATION EXPOSURE
E. MORAN - 2018 41
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• Weakness, fatigue
• Recurrent infections
• Bleeding, gum bleeding
• Bone pain
• Anorexia
LEUKEMIA - SYMPTOMS
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Polycythemia rubra vera (P. vera)
Chronic myeloid leukemia (CML or CGL)
Agnogenic myeloid metaplasia (AMM)
Essential thrombocythemia (ET)
Myelodysplastic syndromes (MDS)
CHRONIC MYELOPROLIFERATIVEDISORDERS
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E. MORAN - 2018 44
Clinically:
Acute leukemia: Acute course, with bleeding, infections
Chronic leukemia: Course is chronic - years
Microscopically:
Acute: Primitive bone marrow cells with poor
differentiation in the bone marrow and in the blood
Chronic: Relatively differentiated bone marrow cells in the
blood
ACUTE VS. CHRONIC LEUKEMIA
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A child with bleeding in the mouth mucosa had low platelets in the blood
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Petechiae in Leukemia
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View of the eye fundus showing multiple spot bleeding caused by low platelets in a patient with acute leukemia
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BLEEDING INTO THE BRAIN IN LEUKEMIA B/O LOW PLATELETS
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Acute leukemia (lymphatic and myeloid):
Chemotherapy
Bone marrow transplantation
Chronic lymphatic leukemia: Chemotherapy
Chronic myeloid leukemia: Chemotherapy
BMT (?)
Polycythemia rubra vera: Phlebotomies
Chemotherapy
LEUKEMIATreatment
E. MORAN - 2018 50
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LUNG CANCER
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AIR POLLUTION AND CANCER
• Combustion of fossil fuels
• Smoking
• Asbestos
E. MORAN - 2018 52
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E. MORAN - 2018 53
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LUNG CANCER
RISK FACTORS
• Active tobacco smoking (87%)
• Passive smoking
• Environmental factors (asbestos, metals)
E. MORAN - 2018 54
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LUNG CANCER
Karolinska Institute:
• Protective effect of dietary vegetables,
primarily carrots (RR=.07)
• Protective effect of non-citrus fruits
(RR=0.6)
E. MORAN - 2018 55
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LUNG CANCER
African Americans
Cases = higher daily mean total fat intake (p<.001)
Controls = higher daily mean fiber intake (p<.001)
and fruits (p=.02)
Mexican Americans
- less total fat intake (p<.002)
- more fiber (p<.001)
- more vegetables (p=.08)
Independent of cigarette smoking, high fat consumption & low
fruit and vegetables contribute to the excess of lung cancer
in African American men
E. MORAN - 2018 56
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E. MORAN - 2017 57
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E. MORAN - 2017 58
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E. MORAN - 2017 59
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E. MORAN - 2017 60
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E. MORAN - 201761
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CANCER SCREENINGGUIDING PRINCIPLES
Burden of Suffering
Risk Factors
Family History (?)
Effective Methods of Early Detection
Results - reliability
E. MORAN - 2018 62
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E. MORAN - 2018 63
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E. MORAN - 2018
• Intense counseling against tobacco smoking
• Routine screening is not recommended in asymptomatic patients
LUNG CANCER SCREENING
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E. MORAN - 2018 66
Population: 53,454 adults 55-74 y.o.
Smoking history: > 2 pack/day for 30 pack/yrs.
Method: Routine Chest X-ray vs. spiral CT three exams/year
Duration of study: 2002 – 2010
Results: published in 2011
20% reduction in mortality of the group given Spiral CT
NLST
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Several histologic types each with specific:
- Growth
- Natural history
- Complications
- Response to treatment
- Survival
LUNG CANCER
E. MORAN - 2018 68
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E. MORAN - 2015 69
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Normal Chest X-ray
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Chest CT Scan Showing Metastases
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PET/CT scanPositron Emission Tomography/Computer Tomography
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E. MORAN - 2015 76
Surgery for curative intent
Surgery for palliative intent
Radiation therapy
Systemic chemotherapy
Intra-caviatry (intra-pleural) chemotherapy
LUNG CANCERTREATMENT
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E. MORAN - 2015 77
Provided that PFT’s are minimally OK:
Wedge resection
Segmental resection of small peripheral lesions.
Lobectomy
Pneumonectomy
LUNG CANCER SURGERY
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E. MORAN 2018
LUNG CANCER: Localized or not?
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E. MORAN - 2015 79
Effective as used alone or in combination with systemic chemotherapy
Dose depends on the histologic type of the cancer
New modalities showed increased effectiveness
LUNG CANCERRADIATION THERAPY
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E. MORAN - 2018 81
Atelectasis (collapse of lung tissue)
Infection > Bronchopneumonia
Pleural effusion
Metastases to brain, adrenals, bones, liver
Paraneoplastic syndromes with metabolic alterations
LUNG CANCERCOMPLICATIONS