摘要: Chronic lymphocytic leukemia developed in four of five siblings, whose father succumbed to the same disease. The pattern immune deficiency leukemic siblings resembled that found nonfamilial cases chronic leukemia, and was correlated with severity clinical involvement. In three peripheral blood cells shared delta-heavy kappa-light chains as only detectable surface immunoglobulin, suggesting on a cellular molecular level family members is identical. fourth youngest sibling had no lymphocytes immunoglobulin. An inherited defect class destined express appears underlie susceptibility this family.