vendredi 16 août 2013

Tumors

A tumor is a generic term which refers to development within normal tissue, a newly formed tissue. It is caused by the dysfunction of cellular development.
Tumor types
we distinguish :
1- Benign tumors : are localized tumors, circumscribed and not generalizing (without metastases). They simply repress the surrounding tissues without invading and therefore have a limited volume. On the other hand, this variety of cells shows no morphological abnormalities (monstrosity). These tumors usually do not cause pathological problems in the patient.
Among the benign tumors, there is:
        The lipoma consisting of fatty tissue
        Fibroids (hard tumors)
2- malignant tumors or cancers: whose specificity is important multiplication and modification of cell morphology, and their ability to invade surrounding tissues or more distant (metastases). This variety of tumor is totally opposed to benign tumors: indeed, they are likely to have a very large volume and are poorly demarcated. On the other hand, malignant tumors tend to recur frequently after ablation. Among the malignant tumors, there are primary tumors and secondary tumors which are metastases.
Among the malignant tumors, there is:
        Carcinoid tumor
        Tumors of the urethra
        Breast tumor is either malignant or benign




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