MedGen

A rare inflammatory rheumatic disease in a child younger than 16 years characterized by arthritis and/or enthesitis and/or acute anterior uveitis. The most commonly affected joints at diagnosis are the knees, ankles, and hips. The small joints of the feet and toes are also often involved. [from ORDO]

A slowly progressing leukemia characterized by a clonal (malignant) proliferation of maturing and mature myeloid cells or mature lymphocytes. When the clonal cellular population is composed of myeloid cells, the process is called chronic myelogenous leukemia. When the clonal cellular population is composed of lymphocytes, it is classified as chronic lymphocytic leukemia, hairy cell leukemia, or T-cell large granular lymphocyte leukemia. [from HPO]

A myeloproliferative disorder characterized by increased proliferation of the granulocytic cell line without the loss of their capacity to differentiate. [from HPO]

Proliferation (excess production) of hemopoietically active tissue or of tissue which has embryonic hemopoietic potential. [from HPO]