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Ramot, B. et al.

The epidemiology of childhood acute lymphoblastic leukemia and non-Hodgkin's lymphoma in Israel between 1976 and 1981.

n epidemiologic survey of childhood acute lymphoblastic leukemia (ALL) and non-Hodgkin's lymphoma (NHL) occurring in Israel, Judea, Samaria and the Gaza Strip between the years 1976 and 1981, revealed 205 cases of ALL and 69 of NHL. The mean annual incidence of lymphatic malignancies was 3.1/10(5) in the Israeli Jews, 2.3/10(5) in the Israeli Arabs and 2.5/10(5) in the Gaza Strip. In the Jewish population there was a peak in the incidence of lymphatic malignancies at the 2-5 years age group, while in the Israeli Arabs this was less prominent. There were no significant differences in the incidence or type of lymphatic malignancies in the various Jewish or Arab groups but there was a trend for a high leukemia to lymphoma ratio (LLR) in the patients from the Gaza Strip. A relatively higher LLR was observed in families of a high socioeconomic status, but it did not reach statistical significance. T-cell ALL comprised about a third of the typed ALL cases. A high proportion of the patients with ALL belonged to the high-risk category: 46% of the Jewish children and 76% of the Gaza Strip children. White blood cell count above 100,000/mm3 were found at presentation in 36.7% of the Gaza Strip patients but only in 9.4% of the Jewish patients. In spite of that, the survival at 4 years of the Jewish and Arab patients was similar. However, the patients with T-cell ALL had a significantly worse survival than the standard risk or the non-T high-risk group: 43.3 +/- 9.7, 66.6 +/- 7.1 and 63.6 +/- 10.4%, respectively. Compared to a previous study conducted in this country in the sixties it appears that the epidemiologic differences that were observed at that time between the various Jewish ethnic groups have practically disappeared.[1]

References

The epidemiology of childhood acute lymphoblastic leukemia and non-Hodgkin's lymphoma in Israel between 1976 and 1981. Ramot, B., Ben-Bassat, I., Brecher, A., Zaizov, R., Modan, M. Leuk. Res. (1984) [Pubmed]

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