Table 2.

BM characteristics among the whole cohort and the different primaries.

Variable	All	Lung	Skin	Breast	GU	CUP	GI	Sarcoma
No. of patients	100	51	17	10	10	6	4	2
No. of BM	809	312	199	146	42	47	41	22
• Supratentorial	580	191	187	71	32	43	35	21
• Infratentorial	229	121	12	75	10	4	6	1
Necrotic changes of BM	184	88	29	11	16	21	6	13

BM, brain metastasis; CUP, cancer of unknown primary; GI, gastrointestinal primary tumor; GU, genitourinary primary tumor; No., number.