Folia medica · 2006
Familial study of chronic lymphocytic leukemia: aggregation of different malignant processes in families with individuals affected with chronic lymphocytic leukemia.
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Nenova Ivanka S, Karnolski Istilian N, Mateva Nonka G, Sotirova Katya N
Аннотация
UNLABELLED: There has been evidence that familial factors play a certain role in some cases of chronic lymphocytic leukemia. It is possible in one or more family members to observe chronic lymphocytic leukemia alone, other malignant disorders or combination of both of them.
THE AIM: of our study was to analyze the association of family history of malignances with the onset of chronic lymphocytic leukemia.
PATIENTS AND METHODS: We conducted a case-control study through direct inquiry of the families of 126 patients with chronic lymphocytic leukemia. The control group consisted of 124 patients with benignant disorders. For statistic data processing we used Fisher's exact test in 2x2 table and Kaplan-Meier survival analyses.
RESULTS: 35.71% of the investigated individuals had first degree relatives with malignant disorders, while in the control group their percentage was 17.7%. Significant correlation between positive family history of malignancy and the onset of chronic lymphocytic leukemia was found (P = 0.0016). The risk of development of chronic lymphocytic leukemia in individuals with family history of malignant disorders was 1.69 times higher than in individuals with negative family history RR = 1.697, 95% C.I. [1.177; 2.448]. There was no significant difference in the general survival between groups with positive and negative family history of malignancy. Stomach cancer was particularly often diagnosed in families with individuals affected with chronic lymphocytic leukemia. Other lymphoproliferative disorders were also registered in 3.9% of the families from the control group.
CONCLUSION: Our data show that there is a high risk of getting chronic lymphocytic leukemia in close relatives of affected individuals with malignant disorders. There was no data for greater aggressiveness of chronic lymphocytic leukemia in patients with positive family history of malignancy.
THE AIM: of our study was to analyze the association of family history of malignances with the onset of chronic lymphocytic leukemia.
PATIENTS AND METHODS: We conducted a case-control study through direct inquiry of the families of 126 patients with chronic lymphocytic leukemia. The control group consisted of 124 patients with benignant disorders. For statistic data processing we used Fisher's exact test in 2x2 table and Kaplan-Meier survival analyses.
RESULTS: 35.71% of the investigated individuals had first degree relatives with malignant disorders, while in the control group their percentage was 17.7%. Significant correlation between positive family history of malignancy and the onset of chronic lymphocytic leukemia was found (P = 0.0016). The risk of development of chronic lymphocytic leukemia in individuals with family history of malignant disorders was 1.69 times higher than in individuals with negative family history RR = 1.697, 95% C.I. [1.177; 2.448]. There was no significant difference in the general survival between groups with positive and negative family history of malignancy. Stomach cancer was particularly often diagnosed in families with individuals affected with chronic lymphocytic leukemia. Other lymphoproliferative disorders were also registered in 3.9% of the families from the control group.
CONCLUSION: Our data show that there is a high risk of getting chronic lymphocytic leukemia in close relatives of affected individuals with malignant disorders. There was no data for greater aggressiveness of chronic lymphocytic leukemia in patients with positive family history of malignancy.