### condition | illness | disease | cancer:

Leukemia
* Many leukemias are very sensitive to traditional cytotoxic chemotherapy.
* Most leukemias arise from non-inherited mutations in the genes of growing blood cells
  - originate in the bone marrow
* affect the blood forming tissues of the body, such as bone marrow and the spleen.
* are cancers of the blood-forming tissues
  - blood-making bone marrow
  - white blood cells
  - that develop in lymphocytes or hematopoietic cells
  - malignant neoplasms of either lymphoid or hematopoietic cell origin
  - primary disorders of bone marrow
  - the leading malignancies among children
* arise when immature white blood cells become abnormal and grow and divide rapidly.
* associated with nucleoporin gene rearrangements tend to be refractory to treatment.
* involve blood-forming tissues and blood cells.

### condition | illness | disease | cancer | leukemia:

Acute leukemia
* accounts for nearly half of all neoplasms in children.
* affects immature white blood cells and is most often seen in children.
* are cancers of blood cells, and are one of two basic types.
* can develop over time and, when it occurs, progresses rapidly.
* can occur at any age, but it is most often seen in children
  - in all age groups
  - over a short period of days to weeks
* gets worse quickly, with fast multiplication of abnormal, immature blood cells.
* is cancer
* is characterized by a rapid increase in the number of immature blood cells
  - byproliferation of immature cells or blasts
* is the most common form of cancer in children
  - malignancy in children
  - type most often found in children
* occurs in two main types of white blood cells.
* progresses in a quick and severe manner
  - short time, compared to other forms of the disease
  - more quickly than the chronic form and has more immature blasts
  - quickly, resulting in a buildup of functionless, diseased cells
* rapidly progressing disease that affects mostly immature cells.
* refers to a leukemia that is very aggressive and worsens over a brief period.

Childhood leukemia
* are mostly acute, with the lymphocytic form predominating.
* is no longer a death sentence.
* occurs broadly and evenly across many populations.

Feline leukemia
* begins with infection of the mouth tissues.
* is caused by a retrovirus that only infects members of the feline family
  - highly contagious
  - incurable, contagious from cat to cat and usually fatal
  - transmitted by direct contact with another cat
  - viral infection
* serious viral disease transmitted by exchange of bodily fluids between cats.

Lobular cancer
* is more likely to appear in both breasts.
* occurs in the milk-producing lobules.

Lymphoma
* Most lymphomas are of B-cell origin.
* affect the lymphatic system.
* are blood tumors
  - rare in the usual practice, while benign enlargement of lymph nodes is common
* begin in the lymph nodes and tissues of the body's immune system.
* have many different appearances.
  - diseases
* originate in the lymphatic system, itself.
* take years, even decades to develop.
* tends to present with large lesions, which are enhanced by gadolinium.

### condition | illness | disease | cancer | lymphoma:

Malignant lymphoma
* affects primarily the lymph nodes.
* are also cancers of lymphocytes.
* invade bone marrow and can cause a myelophthisic myelopathy.
* is notorious for presentation with an epidural mass
  - one of the most common hematological diseases of children

Male cancer
* is an issue about which the general public's awareness is worringly low.
* occur, but are much less common.

Malignant cancer
* are fatal in the vast majority of cases.
* is much more aggressive.

Metastatic cancer
* can spread from their original location to other parts of the body.
* is cancer that has spread
  - treated with chemotherapy or hormone therapy