Juvenile rheumatoid arthritis with myelofibrosis with myeloid metaplasia.

Myelofibrosis with myeloid metaplasia is defined as a myeloproliferative disorder characterized by leukoerythroblastosis, tear drop erythrocytes, extramedullary hematopoesis and varying degree of myelofibrosis. It may be idiopathic or secondary to a large number of conditions. Here is a rare case of myelofibrosis occurring in a patient with juvenile rheumatoid arthritis.