Rheumatoid does not cause leukemia, but there are some similarities between the two.
Rheumatoid arthritis is a chronic autoimmune disease that can cause severe limb deformities, and leukemia is usually caused by autoimmune or genetic abnormalities.
The two are unrelated and do not transform into each other, but there are some similarities, and some chronic leukemia or myelodysplastic syndromes will manifest as autoimmune abnormalities or in combination with rheumatoid arthritis.
Patients with rheumatoid arthritis should be actively treated with drugs including methotrexate and prednisone to slow down the development of joint deformity. Regular reviews should be conducted, and if a progressive decline or elevation of blood cells is noted, it is important to be alert to the possibility of a concurrent combination of leukemia. Specific disease diagnosis and treatment need to be under the guidance of a physician.