Locally advanced rectal cancer: MR imaging in prediction of response after preoperative chemotherapy and radiation therapy.

Purpose: To prospectively differentiate, at magnetic resonance (MR) imaging, patients with locally advanced nonmucinous rectal cancer who will respond to long-course chemotherapy and radiation therapy (CRT) from those who will not respond, with histopathologic results as the reference standard.

Materials And Methods: Institutional review board approval for this study was obtained, and all patients provided written informed consent. High-spatial-resolution T2-weighted MR images were acquired before and 6-8 weeks after CRT in 53 patients (33 men, 20 women; mean age, 63 years; age range, 42-79 years).

A case of primary breast lymphoma.

The case of a patient with a lesion in the right breast, is discussed. Retrospective evaluation of mammography and US previously performed elsewhere were not fully helpful in the differential diagnosis between benign and malignant and MRI was necessary. Morphological and dynamic characteristics could be indicative of an expansive/infiltrating lesion of the breast and support the staging.