entrench (entrenches 3rd person present) (entrenching present participle) (entrenched past tense & past participle) If something such as power, a custom, or an idea is entrenched, it is firmly established, so that it would be difficult to change it. verb.
Leukemia. Leukemias, which are cancers of the bone marrow and blood, are the most common childhood cancers. They account for about 30% of all cancers in children. The most common types in children are acute lymphocytic leukemia (ALL) and acute myelogenous leukemia (AML).rain and central nervous system tumors. Brain and central nervous system tumors are the second most common cancers in children, making up about 26% of childhood cancers. There are many types of brain tumors, and the treatment and outlook for each is different.
Key Points. 1  Childhood acute lymphoblastic leukemia (ALL) is a type of cancer in which the bone marrow makes too many immature lymphocytes (a type of white blood cell). 2  Leukemia may affect red blood cells, white blood cells, and platelets. Childhood acute lymphoblastic leukemia (ALL) is a type of cancer in which the bone marrow makes too many immature lymphocytes (a type of white blood cell).