Yanling Ma, MD

Professor of Clinical Pathology

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Dr. Ma is currently a staff pathologist at both LAC+USC Medical Center and Women’s Hospital and teaches courses in pathology to second year USC medical students. A native of China, Dr. Ma first came to USC in 1994 as a pathology intern at LAC+USC Medical Center. A residency and fellowship at LAC+USC Medical Center followed and in 2000, Dr. Ma was appointed Assistant Professor of Clinical Pathology. Dr. Ma has been a member of the College of American Pathologists since 1977 and is also currently a member of the Keck School of Medicine’s Residency Recruitment Committee. A former Acting Chief of Surgical Pathology, Dr. Ma currently directs the Immunohistochemistry Laboratory.


  • Performance of breast fine needle aspiration as an initial diagnostic tool: A large academic hospital experience Cytopathology. 2022 11; 33(6):707-715. . View in PubMed
  • Assessment of ERBB2/HER2 Status in HER2-Equivocal Breast Cancers by FISH and 2013/2014 ASCO-CAP Guidelines JAMA Oncol. 2019 03 01; 5(3):366-375. . View in PubMed
  • Reprint of: The pathology of pulmonary sarcoidosis: update Semin Diagn Pathol. 2018 Sep; 35(5):324-333. . View in PubMed
  • Are we overtreating intraductal papillomas? J Surg Res. 2018 11; 231:387-394.. View in PubMed
  • Unexpected CDH1 Mutations Identified on Multigene Panels Pose Clinical Management Challenges JCO Precis Oncol. 2017 Nov; 1:1-12. . View in PubMed
  • HER2 Status in Advanced or Metastatic Gastric, Esophageal, or Gastroesophageal Adenocarcinoma for Entry to the TRIO-013/LOGiC Trial of Lapatinib Mol Cancer Ther. 2017 01; 16(1):228-238. . View in PubMed
  • Epidermal Growth Factor Receptor, Excision-Repair Cross-Complementation Group 1 Protein, and Thymidylate Synthase Expression in Penile CancerClin Genitourin Cancer. 2016 10; 14(5):450-456. e1. . View in PubMed
  • Robotic transmural ablation of bladder tumors using high-intensity focused ultrasound: Experimental study Int J Urol. 2016 06; 23(6):501-8. . View in PubMed
  • HER2 Gene Amplification Testing by Fluorescent In Situ Hybridization (FISH): Comparison of the ASCO-College of American Pathologists Guidelines With FISH Scores Used for Enrollment in Breast Cancer International Research Group Clinical Trials J Clin Oncol. 2016 10 10; 34(29):3518-3528. . View in PubMed
  • Histological analysis of the kidney tumor-parenchyma interface J Urol. 2015 Feb; 193(2):415-22. . View in PubMed
  • Inverted lymphoglandular polyp in descending colon Case Rep Pathol. 2015; 2015:646270. . View in PubMed
  • Small bowel dissemination of coccidioidomycosis Case Rep Pathol. 2015; 2015:403671. . View in PubMed
  • Robot-assisted laparoscopic high-intensity focused ultrasound for focal therapy of prostate: novel approach Int J Urol. 2014 Dec; 21(12):1289-90. . View in PubMed
  • Granular cell tumor of the testicular tunica albuginea: a case report Appl Immunohistochem Mol Morphol. 2014 May-Jun; 22(5):395-9. . View in PubMed
  • Denonvilliers’ space expansion by transperineal injection of hydrogel: implications for focal therapy of prostate cancer Int J Urol. 2014 Apr; 21(4):416-8. . View in PubMed
  • Epidermal growth factor receptor-targeted therapy in squamous cell carcinoma of the penis: a report of 3 cases Urology. 2014 Jan; 83(1):159-65. . View in PubMed
  • Percutaneous radiofrequency ablation of virtual tumours in canine kidney using Global Positioning System-like technology BJU Int. 2012 May; 109(9):1398-403. . View in PubMed
  • Columnar-lined esophagus without intestinal metaplasia has no proven risk of adenocarcinoma Am J Surg Pathol. 2012 Jan; 36(1):1-7. . View in PubMed
  • The dilated distal esophagus: a new entity that is the pathologic basis of early gastroesophageal reflux disease Am J Surg Pathol. 2011 Dec; 35(12):1873-81. . View in PubMed
  • A Rare Case Report of Extensive Polyostotic Gorham’s Disappearing Bone Disease Involving the Upper Extremity Case Rep Orthop. 2011; 2011:486756. . View in PubMed
  • Prediction of patients with acute cholecystitis requiring emergent cholecystectomy: a simple score Gastroenterol Res Pract. 2010; 2010:901739. . View in PubMed
  • HER-2 gene amplification, HER-2 and epidermal growth factor receptor mRNA and protein expression, and lapatinib efficacy in women with metastatic breast cancer Clin Cancer Res. 2008 Dec 01; 14(23):7861-70. . View in PubMed
  • The pathology of pulmonary sarcoidosis: update Semin Diagn Pathol. 2007 Aug; 24(3):150-61. . View in PubMed
  • Adenocarcinomas of the distal esophagus and “gastric cardia” are predominantly esophageal carcinomas Am J Surg Pathol. 2007 Apr; 31(4):569-75. . View in PubMed
  • Body mass index is associated with Barrett esophagus and cardiac mucosal metaplasia Dig Dis Sci. 2006 Sep; 51(9):1589-94. . View in PubMed
  • A proposal for a new validated histological definition of the gastroesophageal junction Hum Pathol. 2006 Jan; 37(1):40-7. . View in PubMed
  • Diagnostic evaluation of HER-2 as a molecular target: an assessment of accuracy and reproducibility of laboratory testing in large, prospective, randomized clinical trials Clin Cancer Res. 2005 Sep 15; 11(18):6598-607. . View in PubMed
  • Pleomorphic atypical extraosseous ewing sarcoma in a 25-year-old woman: a cytogenetic diagnosis Appl Immunohistochem Mol Morphol. 2005 Jun; 13(2):201-4. . View in PubMed
  • Angiomyolipoma of the kidney: expanding disease spectrum demonstrated by 3 cases Appl Immunohistochem Mol Morphol. 2004 Sep; 12(3):277-83. . View in PubMed
  • Histologic classification of patients based on mapping biopsies of the gastroesophageal junction Am J Surg Pathol. 2003 Jul; 27(7):929-36. . View in PubMed
  • Perforating Barrett’s ulcer resulting in a life-threatening esophagobronchial fistula Ann Thorac Surg. 2002 Jan; 73(1):302-4. . View in PubMed
  • Leiomyosarcoma of the trachea masquerading as chronic asthma Respiration. 2002; 69(2):165. . View in PubMed