Kimberly M Ray1, Reema Munir2, Dorota J Wisner3, Ania Azziz4, Belinda Chang Holland5, John Kornak6, Bonnie N Joe7. 1. University of California, San Francisco, Department of Radiology and Biomedical Imaging, 1600 Divisadero St., Room C250, Mail Box 1667, San Francisco, CA 94115. Electronic address: kimberly.ray@ucsf.edu. 2. Hill Medical Corporation, 625 S. Fair Oaks Avenue, Suite 140, Pasadena, CA 91106. Electronic address: reemamunir@gmail.com. 3. Kaiser Vallejo Medical Center, 975 Sereno Drive, Vallejo CA, 94589. Electronic address: djwisner@gmail.com. 4. Kaiser San Francisco Medical Center, Department of Radiology, San Francisco, CA. Electronic address: anechco@gmail.com. 5. Kaiser Permanente Northwest, 10180 Southeast Sunnyside Road, Clackamas, OR 97015. Electronic address: bel.chang@gmail.com. 6. University of California, San Francisco, Department of Epidemiology and Biostatistics, Mission Hall: Global Health & Clinical Sciences Building, 550 16th St, 2nd floor, Box #0560, San Francisco, CA 94158-2549. Electronic address: john.kornak@ucsf.edu. 7. University of California, San Francisco, Department of Radiology and Biomedical Imaging, 1600 Divisadero St., Room C250, Mail Box 1667, San Francisco, CA 94115. Electronic address: bonnie.joe@ucsf.edu.
Abstract
OBJECTIVE: To evaluate the prevalence of internal mammary lymph nodes (IMLNs) on breast magnetic resonance imaging (MRI) in a screening population. MATERIALS AND METHODS: We retrospectively reviewed 92 consecutive screening breast MRI exams. Logistic regression was performed to ascertain the risk of IMLNs in cancer-free subjects and to determine whether the risk varies with age. RESULTS: IMLNs were present in 48.9% of patients. Mean node size was 4 mm (range, 3-10 mm). The prevalence of IMLNs was not related to age. No patients developed breast cancer after a mean follow-up of 3 years. CONCLUSION: Subcentimeter IMLNs are common incidental findings at screening breast MRI. Published by Elsevier Inc.
OBJECTIVE: To evaluate the prevalence of internal mammary lymph nodes (IMLNs) on breast magnetic resonance imaging (MRI) in a screening population. MATERIALS AND METHODS: We retrospectively reviewed 92 consecutive screening breast MRI exams. Logistic regression was performed to ascertain the risk of IMLNs in cancer-free subjects and to determine whether the risk varies with age. RESULTS: IMLNs were present in 48.9% of patients. Mean node size was 4 mm (range, 3-10 mm). The prevalence of IMLNs was not related to age. No patients developed breast cancer after a mean follow-up of 3 years. CONCLUSION: Subcentimeter IMLNs are common incidental findings at screening breast MRI. Published by Elsevier Inc.
Entities:
Keywords:
Breast MRI; Internal mammary lymph nodes