PH1-Positive Chronic Myelogenous Leukemia, with Absence of Another G Chromosome, in a Male

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Abstract
ALTERATIONS of smaller acrocentric chromosomes in malignant blood diseases have drawn much attention ever since the Philadelphia (PH1) chromosome was noted in chronic myelogenous leukemia.1 , 2 In 1962 Atkin and Taylor3 described a fifty-three-year-old male patient with untreated chronic myelogenous leukemia whose blood cells had the PH1 chromosome but also lacked a short acrocentric chromosome in the G group, either an autosome or the Y chromosome. In 2 other cases in males Tough et al.4 observed a similar pattern: in 1 patient, lack of a G group member was found in all cells with the PH1 chromosome whereas in the . . .