Gunnlaugur Petur (G. Petur) Nielsen, MD
Associate Pathologist, Massachusetts General Hospital
Subspecialty Head, Bone and Soft Tissue Pathology
Associate Professor of Pathology, Harvard Medical School
Dr. Nielsen provides diagnostic and consultation services in the United States and internationally. He is director of the Electron Microscopy Lab in the Immunopathology Service.
- Department of Pathology
- Cancer Center
- Sarcoma and Connective Tissue Oncology
- Head & Neck Cancers
- Clinical Interests
- Bone and Soft Tissue Pathology
- Electron Microscopy
- Head and Neck Pathology
- Frozen Section Pathology
- Boston: Massachusetts General Hospital
- Medical Education
- MD, University of Iceland Faculty of Medicine
- Residency, Massachusetts General Hospital
- Residency, University of Iceland Faculty of Medicine
- Board Certifications
- Anatomic Pathology, American Board of Pathology
- Pathology, American Board of Pathology
- Foreign Languages
- Accepting New Patients
- Accepting New Patients
- Insurances Accepted
- Aetna Health Inc.
Blue Cross Blue Shield - Blue Care 65
Blue Cross Blue Shield - Indemnity
Blue Cross Blue Shield - Managed Care
Blue Cross Blue Shield - Partners Plus
Cigna (PAL #'s)
Fallon Community HealthCare
Great-West Healthcare (formally One Health Plan)
Harvard Pilgrim Health Plan - ACD
Harvard Pilgrim Health Plan - PBO
Health Care Value Management (HCVM)
Humana/Choice Care PPO
Medicare - ACD
Neighborhood Health Plan - ACD
Neighborhood Health Plan - PBO
OSW - Maine
OSW - New Hampshire
OSW - New York
OSW - Rhode Island
Private Health Care Systems (PHCS)
Railroad Medicare - ACD
Senior Whole Health
Tufts Health Plan
United Healthcare (non-HMO) - ACD
United Healthcare (non-HMO) - PBO
Dr. Nielsen has written extensively on neoplastic and non-neoplastic diseases and of bone and soft tissue. He is the co-author of several book chapters, has participated in writing a number of sections over the last few years for the World Health Organization (WHO) Classification of Tumours of Soft Tissue and Bone, and co-authored Diagnostic Pathology: Bone. Dr. Nielsen is a regular speaker at national and international pathology and orthopedic courses.
Research interests include pathology and biology of bone and soft tissue tumors and the application of ancillary studies in the diagnosis of bone and soft tissue neoplasms. Dr. Nielsen is especially interested in chordoma research. For more information about research concepts, co-authors, and to see a timeline, visit Dr. Nielsen's profile at the Harvard Clinical and Translational Science Center.
View my most recent publications at PubMed
- Giant Cell Tumor of the Uterus: A Report of 3 Cases With a Spectrum of Morphologic Features. Bennett JA, Sanada S, Selig MK, Hariri LP, Nielsen GP, Oliva E. Int J Gynecol Pathol. 2015 Apr 3. [Epub ahead of print]
- SMARCB1-deficient Vulvar Neoplasms: A Clinicopathologic, Immunohistochemical, and Molecular Genetic Study of 14 Cases. Folpe AL, Schoolmeester JK, McCluggage WG, Sullivan LM, Castagna K, Ahrens WA, Oliva E, Biegel JA, Nielsen GP. Am J Surg Pathol. 2015 Feb 25. [Epub ahead of print]
- Cytomorphologic features that distinguish schwannoma from other low-grade spindle cell lesions. Chebib I, Hornicek FJ, Nielsen GP, Deshpande V. Cancer Cytopathol. 2015 Mar;123(3):171-9. doi: 10.1002/cncy.21506. Epub 2015 Jan 8.
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