. 2008 Mar 7;38(6):617–634. doi: 10.1007/s00247-008-0751-y

Table 5.

Pediatric Oncology Group and Children’s Cancer Group for the Study of Rhabdomyosarcoma classification [28]

Stage	Site	Primary tumour^a	Size^b	Regional nodes^c	Distant metastasis^d
I	Orbit	T1 or T2	a or b	N0, N1 or NX	M0
	Head and neck (excluding parameningeal)
	Genitourinary, nonbladder nonprostate
II	Bladder and prostate	T1 or T2	a	N0 or NX	M0
	Extremity
	Cranial parameningeal
	Other (including trunk, retroperitoneum, etc)
III	Bladder and prostate	T1 or T2	a	N1	M0
	Extremity	T1 or T2	a	N1	M0
	Cranial parameningeal	T1 or T2	b	N0, N1 or NX	M0
	Other (including trunk, retroperitoneum, etc)	T1 or T2	b	N0, N1 or NX	M0
IV	All sites	T1 or T2	a or b	N0 or N1	M1

^aT1 tumour limited to original muscle or organ, T2 tumour has extension or fixation to the surrounding tissue.

^ba tumour equal to or less then 5 cm in greatest dimension, b tumour larger than 5 cm in greatest dimension.

^cN0 no clinical involvement of regional nodes, N1 clinical involvement of regional nodes, NX status of regional nodes unknown.

^dM0 no distant metastasis, M1 distant metastasis.