juvenile myelomonocytic leukemia (MONDO_0011908) can be described as follows. A myelodysplastic/myeloproliferative neoplasm of childhood that is characterized by proliferation principally of the granulocytic and monocytic lineages. Myelomonocytic proliferation is seen in the bone marrow and the blood. The leukemic cells may infiltrate any tissue, however liver, spleen, lymph nodes, skin, and respiratory tract are the most common sites of involvement. (WHO, 2001). Also known as: JCML, JMML, juvenile chronic myelogenous leukaemia, juvenile chronic myelogenous leukemia, juvenile chronic myeloid leukaemia, juvenile chronic myeloid leukemia, juvenile chronic myelomonocytic leukaemia, juvenile chronic myelomonocytic leukemia.