Jj. Hoo et al., SUPERNUMERARY ISOCHROMOSOME 4P IN ANLL-M4 MYELOMONOCYTIC TYPE IS ASSOCIATED WITH FAVORABLE PROGNOSIS, Cancer genetics and cytogenetics, 79(2), 1995, pp. 127-129
A case of an acute non-lymphocytic leukemia of M4 type with a supernum
erary isochromosome (4p) in 100% of the initial bone marrow metaphase
cells is reported. The origin of the extra chromosome is verified by t
he fluorescence in situ hybridization technique using a whole chromoso
me 4 painting probe. A possible favorable prognosis of the ANLL-M4 cas
e showing a supernumerary isochromosome (4p) is cautiously emphasized.