“…[10,12] The joint fluid culture was negative in the present case, and this result occurs in 45 to 60% of septic arthritis cases even if cultures are obtained before antibiotics are administered. [5,10,11] Especially in acute leukemia, it remains unclear whether the bacterial infection is located in the joint or the inflammatory changes in the joint are caused by malignancy. [5] In the present case, the child had had constant high fever with pancytopenia, and the elbow joint was still painful, locally heated, and swollen with scratches.…”