Description Of The Four Types Of Leukemia Biology

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Leukemia is a malignant neoplastic disease of the blood that takes topographic point in the bone marrow and involves unnatural uncontrolled cell growing. It can affect either the lymph cells or myeloid cells which are two types of white blood cells. The four types of Leukemia are acute and chronic lymphocyitc ( ALL, CLL ) and myelogenous ( AML, CML ) . Treatments of all signifiers of leukaemia involve either chemotherapy, radiation or a combination of both and in some instances a bone marrow/stem cell graft is required.


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Leukemia is a malignant neoplastic disease of the blood which, like other signifiers of malignant neoplastic disease, involves unnatural and uncontrolled cell division ( ) . Leukemia takes topographic point in the bone marrow which is the soft flexible tissue in the centre of the bone responsible for the organic structure & A ; acirc ; ˆ™s production of both ruddy and white blood cells every bit good as thrombocytes. It starts out a bodily mutant in a individuals DNA doing unnatural ( mutated ) chromosomes. The marrows primogenitor cells so begin to make an unnatural sum of white cells through mitosis ( ) . In some instances the cells are undeveloped root cells and in other instances the cells develop abnormally ( ) . In both instances the quickly spliting cells crowd the bone marrow, go forthing less room and energy for the production of ruddy cells, thrombocytes and functional white cells. As a consequence many of the indispensable maps of the organic structure are badly compromised. Due to the deficiency of working white blood cells the organic structure looses its ability to contend infections. Decreased Numberss of thrombocytes affect the procedure of coagulating taking to inordinate bruising and hemorrhage. Low degrees of ruddy blood cells which are used to transport O through the blood watercourse cause anemia all of which can be fatal.


There are four chief types of leukaemia: acute lymphocytic leukaemia ( ALL ) , acute myelogenous leukaemia ( AML ) , chronic lymphocytic leukaemia ( CLL ) and chronic myelogenous leukaemia ( CML ) . The difference between lymphocytic and myelogeneous leukaemia is the type of white blood cell they affect. In instances of lymphocytic leukaemia T and B cell lymph cells are mutated. T and B cells in their normal province are responsible for acknowledging foreign antigens and so bring forthing antibodies to neutralize ( T ) and kill ( B ) pathogens ( ) . In the long term these cells are what construct up a individuals unsusceptibilities. In the instance of myelogeneous leukaemia granulocytes are affected. Granulocytes are usually responsible for the ingestion and disposal of dead cells including pathogens every bit good as cellular dust ( ) . For this ground the balance between regenerated and dead cells is disrupted. Acute leukemia trades with the proliferation of immature cells ( root cells ) while with chronic leukaemia the cells are mature but damaged restricting their ability to execute their cellular degree maps ( ) . Theses footings besides refer to the rate of addition in their respected unnatural cells. In the instance of ague leukaemia cell division is really rapid frequently showing symptoms shortly after development and necessitating immediate intervention. With chronic leukaemias on the other manus, cellular division occurs at a much slower rate, this can take the patient being symptomless long after the development of the leukaemia. One item particular to chronic myelogenous leukaemia is the characteristic familial abnormalcy that involves portion of chromosome 9 translocating to chromosome 22 ; this is referred to as the Philadelphia chromosome ( ) .

Signs and Symptoms

Due to the important similarities between the four major signifiers of leukaemia, sings and symptoms are frequently the same necessitating complete blood counts and bone marrow spiculum rating to find the type. Peoples with leukemia show symptoms at different times depending on the type ; those symptoms include:

Fever or icinesss

Persistent weariness, failing

Frequent infections

Losing weight without seeking

Swollen lymph nodes, enlarged liver or lien

Easy hemorrhage or bruising

Tiny ruddy musca volitanss in your tegument ( petechiae )

Excessive perspiration, particularly at dark

Bone hurting or tenderness

Low white cell counts, particularly monocytes or neutrophils. ( )


Upon diagnosing health care specializer must make up one’s mind on a program for intervention. Though the particulars of each person protocol vary instance by instance, intervention typically involves chemotherapy, radiation or a combination of both. In some instances with a high hazard of reoccurrence a bone marrow/stem cell graft may be necessary of recommended for precautional steps. There are a some instances where based on age and other wellness factors these interventions airss excessively high a hazard ; in these instances a quality over measure of life attack is taken where intervention aims toward alleviating the symptoms of the leukaemia instead than remedy.

Chemotherapy: With chemotherapy intervention patients are given anticancer drugs in order to kill cancerous cells ( ) . These drugs nevertheless do non aim merely malignant neoplastic disease cells alternatively they affect all quickly spliting cells including healthy blood cells and other cells such as hair follicles ( this is why a typical side consequence of chemotherapy is hair loss ) . Chemotherapy drugs are typically given intravenously but can sometimes be administered orally.

Radiation: Radiation therapy involves the usage of ionising radiation in order to command the growing of malignant cells ( ) . Radiation therapy plants by damaging the Deoxyribonucleic acid of the cancerous cells doing regeneration to halt or lag and some times cut down in size ( ) . Therapy is typically targeted to the affected country ( e.g. cranial, chest, prostate, etc ) of the organic structure due to its potentially harmful side effects.

Bone Marrow/Stem Cell Transplant: In some patients a root cell graft ( once known as a bone marrow graft ) is necessary. During a transplant healthy root cells are collected from the peripheral blood ( antecedently they were taken from bone marrow ) and so frequently treated with chemotherapy agents to gat rid of any leukaemia cells still present ( ) . The root cells are so introduced or reintroduced in to the patient in order to reconstruct the wellness of the bone marrow so that it can bring forth more healthy blood cells. Stem cell grafts can be either autologous ( coming from the patient ) or allergenic ( coming from a giver ) . In the instance of allergenic grafts givers must hold good matched tissue type in order to cut down the hazard of transplant V host disease where the host organic structure recognizes the transplant root cells as being foreign ensuing in the immune system assailing those cells ( ) .

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Description Of The Four Types Of Leukemia Biology. (2017, Jul 12). Retrieved from

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