Which MRI feature differentiates invasive ductal carcinoma from invasive lobular carcinoma?

Which MRI feature differentiates invasive ductal carcinoma from invasive lobular carcinoma?

• A. IDC often presents as a discrete enhancing mass with spiculated margins; invasive lobular carcinoma can be more subtle, with diffuse or patchy enhancement and less conspicuous mass; DWI and diffusion metrics can aid differentiation; correlation with histology is essential.
• B. IDC shows diffuse edema; ILC shows discrete mass.
• C. IDC has no diffusion restriction; ILC shows high diffusion.
• D. IDC and ILC are indistinguishable on MRI.

Answer: (A)