[Cytogenetic study of essential thrombocythemia].
D000368:Aged; D000369:Aged, 80 and over; D003582:Cytogenetics; D005260:Female; D006801:Humans; D007621:Karyotyping; D008297:Male; D008875:Middle Aged; D013921:Thrombocytopenia / Q000235:genetics*