Table 1 Cytogenetic classification... | American Society of Hematology

Table 1

Cytogenetic classification according to the IPSS and the new 5-group classification^2,10

Classification/prognostic group	Abnormalities
Classification/prognostic group	Single	Double	Complex
IPSS
Good	Normal; −Y;	—	—
	del(5q); del(20q)
Intermediate	Other	Any	—
Poor	7*	—	≥ 3†
5-group
Very good	−Y; del(11q)	—	—
Good	Normal; del(5q); del (20q); del(12p)	Including del(5q)	—
Intermediate	del(7q); +8; i(17q); +19; any other	Any other	—
Poor	−7; Inv(3)/t(3q)/del(3q)	Including −7/ del(7q)	3†
Very poor	—	—	> 3†

Classification/prognostic group	Abnormalities
Classification/prognostic group	Single	Double	Complex
IPSS
Good	Normal; −Y;	—	—
	del(5q); del(20q)
Intermediate	Other	Any	—
Poor	7*	—	≥ 3†
5-group
Very good	−Y; del(11q)	—	—
Good	Normal; del(5q); del (20q); del(12p)	Including del(5q)	—
Intermediate	del(7q); +8; i(17q); +19; any other	Any other	—
Poor	−7; Inv(3)/t(3q)/del(3q)	Including −7/ del(7q)	3†
Very poor	—	—	> 3†

— indicates not applicable.

Any chromosome 7 abnormality.

Number of clonal abnormalities.