CT and MR findings in parameningeal leukaemic masses.

This study presents the clinical and imaging findings in seven patients with parameningeal leukaemic masses: four adults with granulocytic sarcoma and three children with soft tissue masses from acute lymphoblastic leukaemia. Computed tomography and magnetic resonance imaging were helpful in detecting these masses and in showing their extent. Magnetic resonance was particularly valuable in demonstrating abnormal bone marrow in the adult patients with granulocytic sarcoma. Computed tomography was valuable in demonstrating leukaemic relapse in the children when examination of CSF or bone marrow showed no evidence of leukaemia.