Acute lymphoblastic leukemia–hand mirror variant. An analysis of a large group of patients

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Abstract
One hundred and thirty-four initial bone marrows and 102 peripheral blood smears were evaluated for hand mirror cells (HMC) on pediatric patients with acute lymphoblastic leukemia (ALL). Twenty (15%) of the 134 patients were found to have greater than 5% HMC in their bone marrows. Only rarely were a few HMC noted in the peripheral blood. Survival did not appear to be related to the number of HMC in the bone marrow. Also, the median survival was not significantly greater in those HMC patients with greater than 40% HMC in their bone marrows when compared to the non-HMC group. From the available data in this study, it would appear that the number of HMC does not affect prognosis in the bone marrows of children with ALL. However, the prognostic significance of the HMC has not been clearly established in adults.