More Lymphoma Diagnosis
- Lumbar puncture: This test, sometimes called a spinal tap, is a method for collecting a sample of the fluid surrounding the brain and spinal cord. This fluid is called cerebrospinal fluid. If the lymphoma has affected the central nervous system, the cerebrospinal fluid will likely contain lymphoma cells.
- Organ function tests: These tests are usually
done before starting treatment to make sure that one's organs are healthy
enough to withstand the side effects of therapy. Examples include an
echocardiogram or MUGA scan (a test that provides a movie-like image of the working heart) for the heart and pulmonary function tests for the
Staging is the classification of a cancer type by its size and whether and how much it has spread around the body. Determining a cancer's stage is very important because it tells the oncologist which treatment is most likely to work and what are the chances of remission or a cure (prognosis).
Staging of lymphomas is based on the results of imaging studies and related tests that reveal the extent of the cancer involvement.
HL is often described as being "bulky" or "nonbulky." Nonbulky means the tumor is small; bulky means the tumor is large. Nonbulky disease has a better prognosis than bulky disease.
NHL is a complicated set of diseases with a complex classification system. In fact, the classification system is continuously evolving as we learn more about these cancers. The newest classification system takes into account not only the microscopic appearance of the lymphoma but also its location in the body and genetic and molecular features.
Grade is also an important component of the NHL classification.
- Low grade: These are often called "indolent" lymphomas
because they grow slowly. Low-grade lymphomas are often widespread
when discovered, but because they grow slowly, they usually do not
require immediate treatment unless organ function is compromised. They are
rarely cured and can transform over time to a combination of indolent and
- Intermediate grade: These are rapidly growing (aggressive) lymphomas that usually require immediate treatment, but they are often curable.
- High grade: These are very rapidly growing and aggressive lymphomas that require immediate, intensive treatment and are much less often curable.
The "staging," or evaluation of extent of disease, for both HL and NHL, are similar.
- Stage I (early disease): Lymphoma is located in a single
lymph node region or in one area or organ outside the lymph node.
- Stage II (locally advanced disease): Lymphoma is located in two or more lymph node regions all located on the same side of the diaphragm or in one lymph node region and a nearby tissue or organ. (The diaphragm is a flat muscle that separates the chest from the abdomen.)
- Stage III (advanced disease): Lymphoma
affects two or more lymph node regions, or one lymph node region
and one organ, on opposite sides of the diaphragm.
- Stage IV (widespread or disseminated disease): Lymphoma is outside the lymph nodes and spleen and has spread to another area or organ such as the bone marrow, bone, or central nervous system.
Both HL and NHL are further classified with letters.
- An "A" or "B" designation indicates whether the person
with lymphoma had symptoms such as fevers and/or weight loss at the time of
diagnosis. "A" indicates no such symptoms, and "B" indicates symptoms.
- An "E" designation indicates that the tumor spread directly from a lymph node into an organ or that a single organ outside the lymphatic system is affected with no apparent lymphatic involvement. If the spleen is involved an "S" designation is added.
Several risk factors have been extensively evaluated and shown to play a role in treatment outcome. For HL, the International Prognostic Index includes the following
seven risk factors:
- Male sex
- Age 45 years or older
- Stage IV disease
- Albumin (blood test)
less then 4.0 g/dL
- Hemoglobin (red blood cell
level) less than 10.5 g/dL
- Elevated white blood cell
(WBC) count of 15,000/mL
- Low lymphocyte count less than 600/mL or less than 8% of total WBC
The absence of any of the above risk factors is associated with an 84% rate of control of Hodgkin's disease, whereas the presence of a risk factor is associated with a 77% rate of disease control. The presence of five or more risk factors was associated with a disease control rate of only 42%.
The outcomes for these patients were also determined by the treatment they received, which occurred primarily in the 1980s. Newer treatments for Hodgkin's lymphoma may improve these predicted outcomes. Furthermore, new treatments are being developed for patients with greater risk factors.
The International Prognostic Index for NHL includes five risk factors:
- Age older than 60 years
- Stage III or IV disease
- High LDH
- More than one extranodal site
- Poor performance status (as a measure of general health): From these factors, the following risk groups were identified:
- Low risk: one risk factor, five-year lymphoma-free survival (LFS) of 70%
- Intermediate risk: two to three risk factors, five-year LFS of 49%-50%
- Poor risk: four to five risk factors, five-year LFS of 26%
The prognostic models were developed to evaluate groups
of patients and are useful in developing therapeutic strategies. It is important to remember that any individual patient might have significantly different results than the above data, which represent statistical results for a patient group.
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