Keagan Lee, MD

Partner & Chief Executive Officer
Board-Certified Dermatopathologist
Dr. Keagan Lee

Dr. Keagan Lee is the CEO and co-founder of Sagis, PLLC, a physician-owned multispecialty diagnostic pathology laboratory headquartered in Houston, Texas. Notably, Sagis has garnered recognition as one of the foremost pathology laboratories of considerable scale within the United States.

Dr. Lee has researched various topics, including melanoma, Merkel cell carcinoma, and sarcoma. His contributions have graced the pages of esteemed pathology journals, including Clinical Cancer Research and the American Journal of Dermatopathology. Beyond his scholarly endeavors, he holds esteemed positions as an Assistant Clinical Professor at the University of Texas Health Science Center in San Antonio and Texas A&M University College of Medicine. Here, he imparts his expertise in dermatopathology to aspiring medical students and residents, fostering the next generation of medical professionals.

In addition to his academic roles, Dr. Lee serves as a Delegate to the American Medical Association for the United States and Canadian Academy of Pathology (USCAP). Previously, he served as a Vice Chair for The Dermatology Foundation, a testament to his commitment to advancing dermatological research. Beyond his professional pursuits, Dr. Lee cherishes quality time spent with his family, relishes enriching travel experiences, and finds joy in coaching youth sports.


Fellowship Training

Ackerman Academy of Dermatopathology
New York, NY

Residency Training

Anatomic & Clinical Pathology
Columbia University Medical Center
New York, NY

Medical School

The University of Texas Medical School at Houston
Houston, TX


University of Notre Dame
Notre Dame, IN

Board Certifications


The American Board of Dermatology and The American Board of Pathology

Anatomic & Clinical Pathology

The American Board of Pathology


American Academy of Dermatology

College of American Pathologists

American Medical Association

United States and Canadian Academy of Pathology

American Society of Clinical Pathology

Texas Society of Pathologists

Texas Dermatological Society

Texas Medical Association

Harris County Medical Society

Austin Dermatological Society

San Antonio Dermatological Society

Research & Publications

Dr. Lee has performed research in a variety of topics focused around abdominal tumors, trauma to muscle tissue and angiosarcoma of which were published in Cutis, Transplantation and Clinical Cancer Research. He has also presented at the UT Health Science Center at Houston Summer Research Program Abstract Conference, the Japanese Society of Nuclear Medicine Meeting, the American Society for Apheresis 27th Annual Meeting and the USCAP Annual Meeting.


  • Lee KH, Mullani NA.  Does antiangiogenic treatment of human tumors with endostatin change blood flow in non-tumor muscle tissue?  [Abstract] — Presented at 2001 University of Texas Health Science Center at Houston Summer Research Program Abstract Conference
  • Kang WJ, Lee KH, Paeng JC, Lee DS, Chung J-K, Lee MC.  Patterns Manifested by FDG PET for Metastatic Peritoneal Seeding. [Abstract] — Presented at Japanese Society of Nuclear Medicine Meeting in 2003
  • Shaw R, Charette K, Jhang J, Papa J, Jefferson R, Lee KH, Torloni S, Schwartz J.  Therapeutic plasma exchange performed in parallel with extra corporeal membrane oxygenation (ECMO) for patients with acute humoral rejection after heart transplantation – feasibility, safety and efficacy.  [Abstract] — Presented at American Society for Apheresis 27th Annual Meeting in November 2006
  • Lee KH, Remotti HE.  Expression of CK7, CK20, CDX2, and CA19.9 in Pancreatic Endocrine Neoplasms (PENs): A Tissue Microarray Analysis.  [Abstract] — Presented at USCAP Annual Meeting in March 2007
  • Lee KH, Remotti HE.  Immunohistochemical Phenotypes of Pancreatic Endocrine Neoplasms (PENs) and Other Pancreatic Tumors that PENs Can Histologically Mimic. [Abstract] — Presented at USCAP Annual Meeting in March 2008
  • Chernoff KA, Bordone L, Horst B, Simon K, Twadell W, Lee KH, Cohen JA, Wang S, Silvers DN, Brunner G, Celebi JT.  GAB2 Amplifications Refine Molecular Classification of Melanoma. Clin Cancer Res. 2009:1;15(13):4288-91.
  • Lee KH, Husain S, Mansukhani MM.  Detection of Merkel Cell Polyomavirus in Merkel Cell Carcinoma, Small Cell Carcinoma of the Lung, and Other Skin Cancers.  [Abstract] — Presented at USCAP Annual Meeting in March 2009
  • Witkowski P, Sondermeijer H, Woodland DC, Lee KH, Bhagat G, See F, Rana A, Maffei A, Itescu S, Hardy MA, Harris PE.  Islet grafting and imaging in a bioengineered intramuscular space.  Transplantation. 2009 Nov 15;88(9):1065-74
  • Lee KH, Rodgers IR, Balfour EM.  Angiosarcoma Arising in the Eyelid.  Cutis.  2012 Apr;89(4):156, 159-60.