[Chronic lymphatic leukemia and chromosomic anomalies (author's transl)]

A cytogenetic study carried out by a blood culture from aspirated medulla of a patient with chronic lymphatic leukemia is here reported. It was possible to observe an anomaly consisting in a small supernumerary acrocentric chromosome of G group. The anomalies associated with CLL related in the literature are shortly reviewed, and the variability of the chromosomopathy in this blood disease are emphazised.