• Department of Pathology
  • Pathology Staff
• Department of Laboratory Medicine
  • Laboratory Medicine Staff
• Affiliated Hospitals
  • Moffitt-Long
  • Mount Zion Medical Center
  • San Francisco Veterans Affairs Medical Center
  • San Francisco General
• Faculty
  • Pathology
  • Laboratory Medicine

Research and Clinical Interests

My interests are in diagnostic surgical pathology, in particular, breast, GI, and liver pathology. One of my goals is to use the results from genetic studies to refine the criteria for pathologic diagnosis. Most of my research activity is as part of a collaborative team of scientists and clinicians interested in study early breast cancer. We are studying the molecular and genetic pathways in breast cancer especially those related to lobular carcinoma. Another area of active research is MRI and pathologic correlation in evaluating breast cancer.

Selected Publications

• Hwang, E, Nyante, S, DeVries, S, Chen, YY, Esserman, L, and Waldman, FM (2004). Clonality of lobular carcinoma in situ and synchronous invasive lobular cancer. Cancer 100:2562-2572.
• Wa, CV, DeVries, S, Chen, YY, Waldman, FM, and Hwang, ES (2005). Clinical application of array-based comparative genomic hybridization to define the relationship between multiple synchronous tumors. Mod Pathol 18:591-597.
• Jacobs, TW. Chen, YY, Guinee, DG, Holden, J, Cha, I, Bauermeister, DE, Hashimoto, B, Wolverton, D, and Hartzog, G (2005). Fibroepithelial lesions with cellular stroma (FELCS) on breast core needle biopsy: Predictors of outcome on surgical excision. Am J Clin Pathol 124:342-354.
• Rabban JT, Swain RS, Zaloudek, C, Chase, DR, and Chen, YY (2006). Immunophenotypic overlap between adenoid cystic carcinoma and collagenous spherulosis of the breast: Potential diagnostic pitfalls using myoepithelial marker. Mod Pathol 19:1351-1357.
• Esserman, LJ, Kumar, AS, Herrera, AF, Leung J, Au, A, Chen, YY, Moore, DH, Chen, DF, Hellawell, J, Wolverton, D, Hwang, ES, and Hylton, NM (2006). Magnetic resonance Imaging captures the biology of ductal carcinoma in situ. J Clin Oncol 28:4603-4610.

• Clinical Associate Professor of Pathology; Director, Immunohistochemistry Lab
• Pathology
• Anatomic Pathology

Specialty Area

• Breast Pathology
• GI and Liver Pathology

Contact Information

• yunn-yi.chen@ucsf.edu
• Phone: 415-353-1102
• Pager: 415-443-0373
• Fax: 415-353-1916

• 505 Parnassus Ave., M559
• San Francisco, CA 94143

Hospital Affiliation(s)

• UCSF Medical Center