Table 3:

MR imaging features of metastatic brain lesions

	Melanoma	Lung
Total lesion number	120	120
Susceptibility effect	42% (50/120)	8% (10/120) (P < .01)
Amelanotic/slightly	49% (17/35)*
Heavily melanotic	33% (10/30)† (P = .4)
Hyperintense T1WI	55% (66/120)	12% (15/120) (P < .01)
Amelanotic/slightly	49% (17/35)
Heavily melanotic	83% (25/30) (P < .01)
Enhancement	78% (94/120)	98% (118/120) (P = .02)
Edema	68% (82/120)	66% (80/120) (P = .56)

^*Total of 35 lesions in 20 patients with biopsy material.

^†Total of 30 lesions in 20 patients with biopsy material.