A dural metastatic small cell carcinoma of the gallbladder as the first manifestation: a case report

Axial brain CT and MRI. CT shows the extra-axial mass in the left posterior lobes (a). MRI shows hyperintensity on T2WI (b), hypointensity on T1WI (c), marginal hyperintensity on the diffusion-weighted image (d), intra-tumor hemosiderin deposits on T2*WI (e), and heterogeneous hyperintensity on gadolinium-enhanced T1WI (f