Lymphoma Flashcards
What are some of the different causes of lymphadenopathy ?
- Lymphoma
- Infection (viral, bacterial).
- Metastatic Cancer eg breast, ovarian.
- Connnective tissue disease (sarcoidosis);SLE.
What is the problem with the symptoms of lymphoma ?
Some of the symptoms such as night sweats and weight loss can be caused by a number of different things so it can be difficult to decide if it is lymphoma causing them or something else:
- Night sweats: lymphoma, infection, menopause, too thick a duvet/central heating.
- Wt loss: Lymphoma, other malignancy, infections etc.
What type of lymphadenopathy distribution does bacterial infections and viral infections cause?
- Bacterial infections tend to cause a more regional lymphadenopathy
- Viral infections tend to cause a more generalised lymphadenopathy
What is the differences in lymphadenopathy felt for a viral, bacterial, lymphoma or metastatic cancer cause ?
What are the two main types of lymphoma?
Hodgkin lymphoma (HL) and non-Hodgkin lymphoma (NHL)
What are the main classifications of lymphoma in practice that you need to know about ?
- Hodgkin’s Lymphoma.
- High grade B cell NHL.
- Low grade B cell NHL.
- Burkitt’s Lymphoma. – very aggressive
- Mantle cell Lymphoma. – look low grade but actually they are horrendously aggressive and not cureable
- Marginal Zone NHL.- very slow changing and often only observation
Describe how hodgkins lymphoma develops
- In Hodgkin lymphoma, B-lymphocytes start to multiply in an abnormal way and begin to collect in certain parts of the lymphatic system, such as the lymph nodes (glands).
- The affected lymphocytes lose their infection-fighting properties, making you more vulnerable to infection.
What is the most common way hodgkins lymphoma presents ?
Often presents with enlarged, painless, non-tender, ‘rubbery’ superficial lymph nodes typically in the cervical, also axillary or inguinal lymph nodes
What are the general features of hodgkins lymphoma ?
- B symptoms - weight loss, fever, night sweats
- Cough or dyspnoea
- Persistent itching of the skin all over the body
- Normocytic anaemia - fatigue, tirdeness etc
- Increased risk of infections
- In some cases, people with Hodgkin lymphoma experience pain in their lymph glands when they drink alcohol - very suggestive sign
- Excessive bleeding e.g. nosebleeds, heavy periods & purpura
- Other symptoms will depend on where in the body the enlarged lymph glands are. For example, if the abdomen (tummy) is affected, you may have abdominal pain or indigestion
What are some of the additional signs which may be present in someone with hodgkins lymphoma ?
- Cachexia – weakness and wasting of the body
- Anaemia
- Splenohepatomegaly
What may happen if medistinel nodes become involved in someone with lymphoma ?
- Bronchial or SVC obstruction may cause ariway obstruction
- Or pleural effusions
Who is most commonly affected by hodgkins lymphoma
Mostly affects young adults in their early 20s and older adults over the age of 70.
What are the risk factors for developing hodgkins lymphoma?
- you have a medical condition that weakens your immune system e.g. HIV (more for non-hodgkins tho)
- you take immunosuppressant medication e.g. taking immunosuppressant after organ transplantation
- Exposure to Epstein-Barr virus (EBV) – which causes glandular fever
- A first degree relative has been affected by lymphoma
- Previously has non-hodgkin lymphoma
What are the main types of hodgkins lymhoma ?
Classical Hodgkin lymphoma is classified into the following 4 types:
- Nodular sclerosing Hodgkin lymphoma (NSHL)
- Mixed-cellularity Hodgkin lymphoma (MCHL)
- Lymphocyte-depleted Hodgkin lymphoma (LDHL)
- Lymphocyte-rich classical Hodgkin lymphoma (LRHL)
A fifth sub type, Nodular lymphocyte-predominant Hodgkin lymphoma (Reed- Sternberg cells are rarely seen in this one)
How is hodgkins lymphoma diagnosed ?
- Excisional biopsy of a complete lymph node which then undergoes histological analyses e.g. fine needle and core biopsies are often insufficient
What are the different tests done to assess the lymph node and bone marrow pathology ?
- Histology-microscopic appearances.
- Immunohistochemistry for solid node.
- Immunophenotyping for blood/marrow.
- Genetic analysis.
- Molecular analysis.
What is the use of immunohistochemistry ?
- Confirming it is a lymphoma, and helping to subclassify.
- Looks at pattern of proteins on the surface of lymphoma cells.
What is the use of cytogenetic studies +/- FISH?
- Many lymphomas have chromosomal abnormalities - for example, translocations - that can be helpful for diagnosis and prognosis.
- FISH is useful in confirming diagnoses of follicular lymphoma (14;18 translocation), mantle cell lymphoma (11;14 translocation), and Burkitt’s lymphoma (8;14 translocation).
- FISH is also useful in identifying C-MYC translocations which predict more aggressive behaviour of diffuse large B-cell lymphoma and transformed follicular lymphoma.
- Consider using FISH (fluorescence in situ hybridisation) to identify a MYC rearrangement in all people newly presenting with histologically high‑grade B‑cell lymphoma.
What is the use of molecular analysis ?
- Patterns of gene expression.
- Multiple analyses looking at patterns of genes that are switched both on an off.
- Helping to further classify lymphoma and identify subtypes suitable for specific treatment.
If lymph node biopsy confirms hodgkins lymphoma what further tests are needed to stage the cancer?
- Blood tests – FBC, film, LFT, LDH, Urate Ca2+, ESR
- CXR
- PET-CT scan (co-administered) of chest, abdo & pelvis +/- bone marrow biopsy
What characteristic type of cell seen on analyses of the biopsy is seen in hodgkins lymphoma ?
Reed sternberg cells – pic saved as reed sternberg cells