FIG 5. A 31-year-old woman (group 1) with heterogenous calvarial thickening.

A, Midsagittal T1-weighted image demonstrates increased thickness of the calvaria with widening of the diploic space and abnormal heterogeneous signal intensity. This finding is presumably related to a long-standing chronic renal failure and associated chronic anemia and osteodistrophy before kidney transplantation.

B, Axial T2-weighted image shows thickened and heterogenous diploic space of the calvaria.

C, Axial postcontrast T1-weighted image corresponding to B reveals heterogenous enhancement of the calvaria.