Table 2.

Summary of cytogenetic data in 15 patients with giant cell tumor of bone

	Involvement in ≥ 2 TAsa		Clonal abnormalities
Case	Chromosome telomere	No. of cellsb	Abnormality	No. of cells	Nonclonal abnormalities
1	2qter	2	t(5;10)(p13;q22)	3	t(14;18)(q24;q21)
	9qter	2			del(5)(q13q33)
	12pter	3			der(11)(t(11;?)(q13;?)
	19qter	6			der(19)t(19;?)(q13;?)
	20qter	5
2	15pter	3		Ø	t(l5;21)(p11;q11)
					t(14;21)(p12;p13)
					t(8;22)(ql3;ql3)
3	5pter	5	der(20)t(13;20)(q12;q13)	3	del(15)(q13q26)
	8qter	2	del(9)(p13p22)	2	der(16)t(13;16)(q12;q22)
	10pter	2	−X, −8, −15, −20	4
	11pter	3	−9	5
	16pter	2	+16	2
	20qter	3	−19	3
4	19qter	3		Ø	t(6;19)(q15:q13)
					t(14;19)(q22;q13)
					t(3;4)(q25;q21)
					del(3)(p21p23)
					del(18)(q12.2)
5	3pter	2	−22	4	der(5)t(5;?)(p15;?)
	9pter	2			del(11)(q22q23)
	11pter	4			der(3)t(3;?)(p11;?)
	16pter	2
	19qter	2
6	7qter	2		Ø	der(12)t(8;12)(q11;p11)
7		Ø		Ø	del(2)(p13)
					del(19)(q11)
					der(11)t(11;?)(p13;?)
8	8pter	3	dic(11;19)(p15;q13)	2
	11pter	3
	19qter	6
	22pter	3
	22qter	2
9	19qter	14	der(19)t(19;?)(q13;?)c	14	der(2)t(2;?)(?q37;?)
			−X,t(1;3)(p32;q21)	15
10		Ø		Ø	del(8)(p11.2)
11	5qter	2		Ø	double ring = 1
	14qter	5			double minute = 1
	21qter	3			marker 15 = 1
12		Ø		Ø
13	10pter	2	ring 17	2
14		Ø		Ø
15	16pter			2	2 markers
					−22 = 2

^aTA, telomeric association, see text.

^bSome cells may contain 2 TA’s involving the same terminus.

^c3 different slides.