In this report we describe the MR imaging findings, including dynamic
data, in a patient with primary non-Hodgkin's lymphoma of the breast.
The precontrast T1-weighted sequence showed several hypointense, ill-d
efined, non-spiculated masses. In the T2-weighted images the masses sh
owed a hyperintense halo. In the dynamic and postcontrast sequences al
l lesions enhanced markedly, and a further large mass was discovered.
In comparison to mammography and sonography. only MR imaging identifie
d the multicentric extent of the tumour. Differentiation from invasive
cancer, based on either MR or conventional imaging features, was not
possible.