The II Department of Pediatrics, University Medical School, Budapest, Hungary. Or ’. Hetil. 110:713-720, 1969. Structural chromosomal aberrations ( breaks, endomitoses ) characteristic of Fanconi’s anemia were demonstrable in two cases. The red cell AlT level in both cases and hexokinase activity in the first one were normal. Thus, no correlation between chromosomal aberrations and disturbances...