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Assessment of breast cancer recurrence with contrast-enhanced subtraction MR imaging: preliminary results in 26 patients.
Radiology 1993 August
Local relapse was suspected in 26 women treated conservatively for breast cancer. All women underwent routine magnetic resonance (MR) imaging and a dynamic MR subtraction study after injection of gadolinium-tetraazacyclododecanetetra-acetic acid. Twelve women had no local relapse. Surgical biopsy enabled confirmation of recurrence in 14 patients. Routine MR imaging did not allow differentiation of recurrence from glandular or scar tissue. Except for one case of fat necrosis, patients without local relapse showed no contrast enhancement 1 minute 34 seconds after injection. At dynamic MR imaging, all recurrences showed contrast enhancement 1 minute 34 seconds after injection. Nodular enhancement (n = 11) was found in invasive carcinoma, whereas linear enhancement was seen in intraductal carcinoma (n = 3). Subtraction of precontrast from postcontrast images always allowed better visualization of contrast enhancement. Contrast-enhanced subtraction dynamic MR imaging may prove to be accurate in diagnosis of local relapses of breast cancer.
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