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Hereditary chronic lymphocytic leukemia: an extended family study and literature review
Henry T Lynch1, Dennis D Weisenburger, Brigid Quinn-Laquer
1Department of Preventive Medicine and Public Health at Creighton University School of Medicine, Omaha, NE 68178, USA. htlynch@creighton.edu
Insights
This study documents a rare family with hereditary B-cell chronic lymphocytic leukemia (B-CLL) spanning multiple generations. Findings suggest an autosomal dominant genetic transmission pattern for this leukemia.
Area of Science:
- Hematology
- Genetics
- Oncology
Background:
- B-cell chronic lymphocytic leukemia (B-CLL) is the most common leukemia in Western nations.
- The exact cause of CLL remains unclear, but hereditary factors are increasingly implicated.
- A significant portion of CLL cases may have a genetic predisposition.
Purpose of the Study:
- To report on a unique family with a high incidence of B-cell chronic lymphocytic leukemia.
- To investigate the potential hereditary basis of CLL within this documented family.
- To analyze the mode of genetic transmission of CLL in this family.
Main Methods:
- Comprehensive review of family history, medical records, and pathology reports.
- Collection and analysis of peripheral blood lymphocytes.
- Cytogenetic and fluorescence in situ hybridization (FISH) analyses were performed.
Main Results:
- The family exhibited a clear pattern of CLL occurrence across generations.
- The disease affected a father and his four sons, including identical twins.
- Genetic analyses supported an autosomal dominant inheritance pattern for CLL.
Conclusions:
- The documented family provides strong evidence for hereditary transmission of B-cell chronic lymphocytic leukemia.
- An autosomal dominant mode of genetic transmission is suggested for CLL in this family.
- Such well-documented families are crucial for understanding CLL etiology, pathogenesis, and prevention.
Abstract:
Leukemia is manifested in about 1-2% of people in Western industrialized nations. The most common form of leukemia is B-cell chronic lymphocytic leukemia (B-CLL), which accounts for approximately 30% of all cases. While CLL's etiology remains elusive, there is increasing evidence that substantially supports the role of hereditary factors in a subset of cases of this disease. Our purpose is to describe an extremely well documented CLL family wherein the disease has been verified in a father and his four sons; two of the sons are identical twins. The family history, including available medical records and pathology reports, was gathered and reviewed. Peripheral blood lymphocytes were used for cytogenetic and fluorescence in situ hybridization analyses. The family reported herein shows classic findings in support of an autosomal dominant mode of genetic transmission of CLL. Given the explosive developments in molecular genetics during the past decade, it is certain that families of this type will provide important clues to the etiology, pathogenesis, and ultimate prevention of CLL.