Fig 4. A 69-year-old man with small-cell carcinoma from the lung.

A, On T2-weighted fast spin-echo image, the solid portion of a right parietal mass lesion (arrow) is hyperintense relative to the normal-appearing white matter. The CNR of the enhancing lesion was 45.

B, On contract-enhanced T1-weighted image, the peripheral region of the lesion is enhanced (arrow).

C, On DWI, the lesion is hyperintense relative to the normal-appearing cortical gray matter (arrow). The lesion was graded as +2.

D, On ADC map, the solid lesion is slightly hyperintense. Its nADC was calculated as 0.57.

E, Photomicrograph of the specimen (hematoxylin-eosin stain; original magnification, 40x) shows high cellularity. The tumor cellularity was calculated as 0.72.