Research Interest: Role of Calcium Regulating Hormones in Health and Disease. Over the Past Twenty Years His Laboratory Has Explored the Role of Vitamin D and Parathyroid Hormone Related Peptide (Pthrp) in Cancer and Musculoskeletal Disorders. His Team Was the First to Demonstrate The Efficacy of Vitamin D on Bone Aging and Prevention of Fat Accumulation in the Bone Marrow. Recently, He Co-Authored the First Evidence Linking Vitamin D Insufficiency, Muscle Fat Accumulation and Muscle Strength. His Laboratory Established the Role of the Hormone Pthrp as a Biomarker of Survival in Cancer and More Recently as a Critical Mediator of Tumor Initiation and Progression in Breast Cancer. His Clinical Research Unit Located at the Mcgill University Health Center also Participates in Major Multicenter Trials on Osteoporosis and Bone–Related Cancer Trials

Undergraduate 1994-2000 , High School (specializing in classical studies) , Pescara, Italy

Graduate 2001-2008 M.D. University School of Medicine " G. d'Annunzio", Chieti-Pescara, Italy

Postgraduate training 2009-2014 Resident in Orthopaedic an Traumatology, SS. Annunziata Hospital, Chieti, University "G. d'Annunzio", Chieti-Pescara, Italy

2014- 2017/2018 PhD Student, Department of Medicine and Science of Aging, University "G. d'Annunzio", Chieti- Pescara, Italy.

2019-to date Medical Doctor, Orthopaedic and Traumatology Division, SS. Annunziata Hospital, Chieti, Italy.

Research Interest:

Osteoarthritis; cartilage biology; orthopedic research; regenerative medicine; sports; fracture healing   

Research Interest: Nutrition and Food Related Diseases, Obesity, Autoimmune Diseases, Pharmacology of Inflammation, Sanfilippo Syndrome

Research Interest: Paediatric Orthopaedics

Research Interest: Rank-Rankl-OPG System in Bone Disease, Osteoporosis and Metabolic Bone Disease, Ultrasound and DXA Diagnostic of Bone Disease, Extra-Skeleton Effect of Vitamin D3,Genistein Effects on Skeleton and Cardiovascular System in Postmenopausal Women, Biological Drugs in Rheumatic Disease, Rheumatic Disease, Bone Density in Inflammatory Bowel Disease in Children, Osteoarthritis: Diagnostic and Intra-Articular Treatment

Research Interest: Knee Surgery; Rheumatoid Arthritis; Sports Medicine; Biomechanics

Research Interest: Pediatrics, Cerebral Palsy, Coordination, Activity, Participation

Research Interest: Shoulder Surgery, Sports Medicine and Arthroscopic Surgery, Knee Surgery

Research Interest: Bone and Soft Tissue Sarcoma, Spinal Tumor

Research Interest: Genetics, Next Generation Sequencing, Vertebral Malformation and Scoliosis

Research Interest: Osteoarthritis; Diabetes; Development; Toxicology

Research Interest: Orthopaedic Surgical Oncology, Spine Surgery

Mr Tzatzairis obtained his Medical degree in Democritus University of Thrace in 2010. After that, he was trained in Trauma and Orthopaedics in University Hospital of Alexandroupolis. In March of 2018 he was awarded with the MSc Certificate after supporting his thesis (graded 10/10). He is a PhD candidate, as he has already completed all of his coursework and currently is working on his thesis/dissertation. After completing his training, he was appointed as Paediatric Orthopaedic Fellow at Royal London Hospital 1 year ago where he’s working at this moment.

His main area of work was adults’ hip/knee reconstruction but he’s currently evolving his career with special interest in children’s Trauma and Orthopaedics (DDH/CTEV/Paediatric Trauma). He is an expert reviewer in several reputed journals and has numerous research publications.

Research Interest: Total Knee Arthroplasty, Total Hip Arthroplasty, Paediatric Orthopaedics, Developmental Dysplasia of the Hip, Paediatric Orthopaedic Trauma

List of Publications:

1: Tzatzairis T, Drosos GI, Vogiatzaki T, Tilkeridis K, Ververidis A, Kazakos K.
Multiple intravenous tranexamic acid doses in total knee arthroplasty without
tourniquet: a randomized controlled study. Arch Orthop Trauma Surg. 2019 Mar 22.
doi: 10.1007/s00402-019-03173-z. [Epub ahead of print] PubMed PMID: 30903342.

2: Tzatzairis T, Firth G, Parker L. Adolescent Lisfranc injury treated with
TightRope(TM): A case report and review of literature. World J Orthop. 2019 Feb
18;10(2):115-122. doi: 10.5312/wjo.v10.i2.115. eCollection 2019 Feb 18. PubMed
PMID: 30788228; PubMed Central PMCID: PMC6379736.

3: Tzatzairis T, Fiska A, Ververidis A, Tilkeridis K, Kazakos K, Drosos GI.
Minimally invasive versus conventional approaches in total knee
replacement/arthroplasty: A review of the literature. J Orthop. 2018 Mar
27;15(2):459-466. doi: 10.1016/j.jor.2018.03.026. eCollection 2018 Jun. Review.
PubMed PMID: 29881177; PubMed Central PMCID: PMC5990225.

4: Tzatzairis T, Papathanasiou JV, Ververidis A, Kazakos I, Drosos G, Tilkeridis
K. Oblong Sesamoid Bone Appearance into the Nuchal Ligament. A Case Report. Folia
Med (Plovdiv). 2018 Mar 1;60(1):175-179. doi: 10.1515/folmed-2017-0079. PubMed
PMID: 29668444.

5: Themistoklis T, Theodosia V, Konstantinos K, Georgios DI. Perioperative blood
management strategies for patients undergoing total knee replacement: Where do we
stand now? World J Orthop. 2017 Jun 18;8(6):441-454. doi: 10.5312/wjo.v8.i6.441.
eCollection 2017 Jun 18. Review. PubMed PMID: 28660135; PubMed Central PMCID:
PMC5478486.

6: Tzatzairis TK, Drosos GI, Kotsios SE, Ververidis AN, Vogiatzaki TD, Kazakos
KI. Intravenous vs Topical Tranexamic Acid in Total Knee Arthroplasty Without
Tourniquet Application: A Randomized Controlled Study. J Arthroplasty. 2016
Nov;31(11):2465-2470. doi: 10.1016/j.arth.2016.04.036. Epub 2016 May 11. PubMed
PMID: 27267228.

7: Tilkeridis K, Tzatzairis T, Tryfonidis M, Elliot DS, Simonis RB. The first
description in the literature, of a complication during the extraction of a
retrograde expandable intra-medullary nail in three patients. Trauma Case Rep.
2016 Apr 13;2:21-27. doi: 10.1016/j.tcr.2016.03.006. eCollection 2016 Feb. PubMed
PMID: 29942835; PubMed Central PMCID: PMC6011861.

8: Tamiolakis DJ, Venizelos ID, Cheva AD, Lambropoulou MC, Nikolaidou SA,
Jivannakis TE, Tzatzairis TC, Gaitanidis CS, Papadopoulos NE. Fine needle
aspiration cytology diagnosis of gastrointestinal stromal tumors utilizing
scanning electron microscopy. Medicina (Kaunas). 2005;41(2):117-22. PubMed PMID:
15758577.

Research Interest: Invited Sarcoma Expert for a Teaching Session for Fellows in Oncology, Invited Sarcoma Expert for a Teaching Session for Orthopedic Fellows, Supervise Oncology Fellows an a Multidisciplinary Clinic for Sarcoma and Connective Tissue Oncology

Research Interest: Stem Cell Biology, Tissue Engineering, Knee, Orthopaedics, Trauma

Research Interest: Lower Limb Primary and Revision Arthroplasty, Hip and Knee Arthroscopy, and Truma