[Pathological correlation of dynamic magnetic resonance findings for XXXX ].

@entity5 @entity1 @entity1358
OBJECTIVE: To explore the dynamic magnetic resonance (MR) imaging findings of @entity1358 and evaluate its pathological correlation. METHODS: Twelve cases with @entity1358 confirmed by surgical pathology underwent MR plain scanning and dynamic enhancement scanning before operation. And the MR data were reviewed and analyzed retrospectively in comparison with surgical and pathological results. RESULTS: Twelve lesions were located in right kidney (n = 9) and left kidney (n = 3) with a mean @entity5 diameter of 7.3 cm (range: 3.2 - 12.6 cm). They were located in renal cortex (n = 1), renal medulla (n = 9) and the middle of cortex and medulla with a relatively normal renal shape. Nine lesions appeared global and 3 elliptic in shape. Well-defined margin was showed in 12 lesions and a thin capsule was observed in all lesions. The @entity5 presented a low to middle homogeneous signal intensity on T1WI and intermediates homogeneous signal intensity on fat saturated FSE-T2WI with a hypointense thin capsule and a hyperintense central scar. A mild-to-middle degree of @entity5 enhancement in cortical phase ( @entity5 SI change 120.3% with a standard deviation of 84.3 and a median of 115.2%) was slightly lower, isointense or slightly higher than renal medulla. And obvious enhancement in portal venous phase( @entity5 SI change 173.7% with a standard deviation of 92.4 and a median of 171.5%) was lower than renal medulla. CONCLUSION: @entity1358 typically forms large and well-circumscribed global solid masses in renal medulla. With a relatively normal renal shape and a thin capsule, it shows intermediate homogeneous signal intensity on T1WI and T2WI. And a middle degree enhancement with central stellate scar is found in some @entity1 .
