Type

Blasts in BM

Blasts in blood

Siderobl. in BM

Monocytes in blood

MDS 1/RA

<5%

<1%

- (<15%)

<1 x 10(9)/l

MDS 2/RAR

<5%

<1%

+ (>15%)

<1 x 10(9)/l

MDS 3/RAEB

5-20%

<5%

+ / -

<1 x 10(9)/l

MDS 4/CMML

5-20%

<5%

-

>1 x 10(9)/l

MDS 5/RAEB-t

21-29%

<30%

+ / -

<1 x 10(9)/l

AML

>30%

>30%

+ / -

AML after a well established phase of MDS is classified as MDS-AML