LYMPHATIC AND IMMUNE SYSTEM
Presentation 6: By Yvette Gham
The lymphatic and immune system
Consist of a network of lymphatic vessels, lymph nodes, spleen, thymus gland and tonsil.
It collects excess fluid throughout and the body and returns it to the circulatory system.
It assist the circulatory system in transporting substances throughout the body.
It serves as the body primary defense system against invasion of pathogens.
Hodgkin’s Disease
It is a type of lymphoma(cancer) originating from lymphocytes.
It is named after Thomas Hodgkin who first described abnormality in the lymph system.
It is characterized by orderly spread of disease from one lymph node group to another and the development of system symptoms.
Treated with radiation and chemotherapy depending on age and sex.
The lymphatic system
Hodgkin’s disease Survival rate is high especially if detected earlier. TYPES It can be subdivided into 4 pathological subtypes
based on Reed- Sternberg cell morphology1. Nodular sclerosing: it is the most common and
composed of tumor nodules showing scattered lacunars.
2. Mixed- cellularity subtype: it is composed of numerous RS cell admixed with numerous inflammatory cells like lymphocytes, histiocytes, eosinophils and plasma cells without sclerosis. It
Hodgkin’s disease
TYPES
It is associated with EBV infection.3. Lymphocyte rich: It is rare subtype which
shows many features which may cause diagnostic confusion with nodular lymphocyte.
4. Lymphocyte depleted: it is composed of a large number of RS cells with only few reactive lymphocytes.
Causes
Specific cause is unknown or multifunctional.
Risk factor include:1. Sex2. Age ,15-40 and over 55.3. Family history4. Weakened immune system5. Infection with HIV6. Prolong use of human growth hormones
Hodgkin’s disease
Hodgkin’s lymphoma, liver involved
Sign and symptoms
Night sweat Weight loss Enlargement of one or more lymph node. Splenomegaly: enlargement of spleen. Hepatomegaly: enlargement of liver. pain,. Fever Red -colored patches
Hodgkin’s lymphoma
Diagnosis
Lymph node biopsy Blood test Positron emission tomography(PET) used
to detect deposits that do not show on CT scanning
Gallium scan may be used
Management
Radiation therapy and chemotherapy depending on age and sex.
Sarcoidosis
Disease in which swelling or inflammation occur in the lymph node, lungs, liver, skin or other tissues.
Symptoms Almost all patients have lungs and chest
symptoms. Dry cough
Symptoms
Shortness of breath Discomfort behind breast bone Abnormal breath sound Fatigue Fever Weight loss Join pain Skin rash
Symptoms
Skin rash Skin lesion Hair loss Headache Seizure Enlargement of lymph glands, liver,
spleen Dry mouth
Treatment
Symptoms get better without treatment. Corticosteroids Immunosuppressive medication such as
azathioprine.
Cause It is unknown. In sac, clumps of abnormal tissue
(granulomas) form certain organs of the body
Sarcoidosis
sarcoidosis
Causes
Possible causes include:1. Excess sensitivity to environmental factor2. Genetics3. Extreme immune response to infection.
test and diagnosis. Chest x-ray to see if lungs and lymph
node s are involved CT scan
Test and diagnosis
Lungs gallium(GA) scan
Biopsies of different tissues to be done Lymph node biopsy Skin lesion biopsy Bronchoscopy to perform a biopsy Open lungs biopsy Kidney, liver and heart biopsy
Disease may also alter the result of the following lab test
CPC. Chem-7 or chem-20. Quantitative immunoglobulin PTH Serum phosphorus Calcium- urine. Liver function test Calcium ionized
Complication.
Osteoporosis Diffusion interstitial pulmonary fibrosis Pulmonary hypertension Fungal lungs infection Anterior uveltis Glaucoma Cranial or peripheral nerve palsies High calcium level Organ failure Kidney stones
When to contact a doctor.
Difficulty breathing. Vision change Palpitation Other symptoms.
Kaposi’s sarcoma It is a tumor caused by human herpes
virus 8(HHV8). Originally described by Moritz Kaposi
practicing in the University of Vienna in 1872.
Caused by viral infection.
Classification HHV8is responsible for all variety of
Kaposi's sarcoma
Classification
1. Indolent disease: this is seen on men from the Mediterranean region and East European descent.
2. Endemic Kaposi's sarcoma was later described from young African people from sub- Sahara Africa.
3. Transplant related Kaposi's sarcoma has been described. It arises when an HHV8 infected organ is transplanted into someone who has not been exposed to the virus.
Classification
4. Epidemic Kaposi's sarcoma is an aggressive disease in AIDS patients.
Types Classical Kaposi's sarcoma African cutaneous Kaposi's sarcoma African lymphadenopathic Kaposi's sarcoma AIDS associated with Kaposi's sarcoma Immunosuppression – associated with
Kaposi's sarcoma
Signs and symptoms
Lesions are nodules or blotches May be red, purple, brown, black and
papular. May appear on skin, mouth,
gastrointestinal tract and respiratory tract
Treatment and prevention Blood test to detect antibodies against
KSHV have been developed.
Kaposi’s sarcoma
Kaposi’s sarcoma
Kaposi’s sarcoma
Treatment and prevention
Kissing is a risk factor. Lab test done on organs before transplant.
Causes Interaction of HIV and weak immune
system HHV8 POSSIBLE COMPLICATIONS Cough and shortness of breath Leg swelling that may be painful
Prevention
Safe sexual practices can prevent HIV infection
References
www.google.com Human anatomy and physiology by
Marieb. 8th edition. Taber’s cyclopedic Medical Dictionary by
F. A Davis company.
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