Albert Levan

Albert Levan, working with John J. Biesele at the Sloan-Kettering Institute in New York, was among the first investigators to trace chromosome abnormalities all the way to actual malignancy. Their work placed chromosomal damage before cancer’s development, framing malignancy as the eventual outcome of instability and mutations accumulated over time.

Research and collaboration

Levan’s significance here is defined through his collaboration with John J. Biesele. The two researchers pursued the connection between abnormalities in chromosomes and cancer tissue beyond observation of irregular chromosomes, tracing those abnormalities to actual malignancy. The book presents this as an important step in relating cellular changes to the disease itself.

Chromosome damage and malignancy

On the question of which came first, the malignancy or the disturbance of the chromosomes, Levan and Biesele answered decisively: the chromosomal irregularities preceded the malignancy. Their conclusion reverses an account in which chromosome disorder is merely a consequence of cancer; instead, it makes the disturbance part of the process leading toward it.

The surrounding description gives this claim a physical basis. Chromosomes in cancer tissue may be broken or damaged, vary erratically in number, or even occur in double sets. Levan and Biesele’s finding connects such instability with the earlier stages of malignancy, rather than treating it as an incidental feature of established cancer.

The latent process

Levan and Biesele proposed that, after initial chromosome damage and the instability that followed, cells might pass through a long period of trial and error across many generations. In this account, the latent period of malignancy is not an empty interval: mutations accumulate through successive cell generations until the cells acquire the changes that allow them to escape normal controls. The cancer that finally appears is thus the outcome of a prolonged cellular history, beginning with chromosome damage.