Factors Influencing the Outcome of Patients with Primary Ewing Sarcoma of the Sacrum

Table 1

Descriptive statistics of the patient collective.

Patient characteristics		N (total N = 124)	%
Age	<18	78	62.9
	≥18	46	37.1
Gender	Male	79	63.7
	Female	45	36.3
Tumor volume	<200 mL	64	51.6
	≥200 mL	41	33.1
	Unknown	19	15.3
Metastases at diagnosis	Yes	53	42.7
	No	70
	Unknown	1
	Pulmonary	35	57.3
	Extrapulmonary	17
Local therapy	No local therapy	7	5.6
	Surgery only	5	4
	Radiotherapy only	74	59.7
	Surgery + radiotherapy	29	23.4
	Unknown	9	7.3
Study protocol	GPOH EE99	69	55.6
	EWING 2008	55	44.4
Affected sacral levels	S1 and higher	16	12.9
	S2 and lower	32	25.8
	Unknown	76	61.3