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Orthopedic Surgery and Trauma Service

Physician Bios

John S. Blanco, MD

Areas of Expertise: Pediatrics
(Tel.: 646-797-8366)

Dr. John S. Blanco specializes in scoliosis correction (anterior and posterior), clubfoot correction, pediatric fracture management, and management of neuromuscular conditions. He is Associate Professor of Orthopaedic Surgery at Weill Cornell Medical College, Associate Attending Orthopaedic Surgeon at NewYork-Presbyterian Hospital/Weill Cornell Medical Center, and Associate Attending Orthopaedic Surgeon at the Hospital for Special Surgery.

His clinical interests involve spinal deformity treatment (including early onset scoliosis treatments), surgical and nonsurgical management of pediatric fractures, neuromuscular conditions, clubfeet, pediatric hip conditions, and management of angular deformities of the extremities (including limb length inequalities).

Dr. Blanco received his medical degree from Cornell University Medical College. After completing his residency training in orthopaedic surgery at New York Medical College he spent an additional year of specialty training as a pediatric orthopaedics and scoliosis fellow at Texas Scottish Rite Hospital in Dallas, Texas.

Beginning his career at The University of Virginia Health Sciences Center, Dr. Blanco was promoted to Associate Professor of Orthopaedics and Pediatrics and was later named Chief of the Division of Pediatric Orthopaedics. In 2003, he relocated to the Atlanta Scottish Rite Hospital, where he served as Director of the Pediatric Orthopaedic Fellowship, as well as the Director of Resident Education. In 2008, he returned to New York City to join the expanding Division of Pediatric Orthopaedics at the Hospital for Special Surgery.

His research interests are scoliosis and pediatric fracture treatment. He is certified by the American Board of Orthopaedic Surgery.

Aaron Daluiski, MD

Areas of Expertise: Hand
(contact info.)

Dr. Daluiski is an orthopaedic surgeon and researcher specializing in hand and upper extremity surgery. He is Assistant Professor of Orthopaedic Surgery at Weill Cornell Medical College, Chief of the Hand and Upper Extremity Service at NewYork-Presbyterian Hospital/Weill Cornell Medical Center, and Assistant Attending Orthopaedic Surgeon at the Hospital for Special Surgery.

His areas of expertise are:

  • Hand, wrist, and elbow disorders
  • Fractures of the upper extremity
  • Carpal tunnel syndrome
  • Arthritis of the upper extremity
  • Elbow and wrist pain

Dr. Daluiski's research interests include exploring on a molecular level how limbs develop and fractures heal; and treatment methods for arthritis of the thumb, wrist fractures, and elbow stiffness.

Dr. Daluiski received his medical degree from the University of California, Los Angeles. He completed his residency training in the Department of Orthopaedic Surgery at UCLA, where he also completed a research fellowship concentrating on the molecular aspects of limb development and bone biology. He completed a Hand and Upper Extremity clinical fellowship at the Hospital for Special Surgery.

Dr. Daluiski is certified by the American Board of Orthopaedic Surgery and holds a Certificate of Added Qualification in hand surgery. He is a member of the AAOS and American Society for Surgery of the Hand.

Gregory S. DiFelice, MD

Areas of Expertise: Hip, Sports/Soft Tissue Trauma, Medical Orthopaedic Trauma
(contact info.)

Dr. Gregory S. DiFelice is a fellowship-trained orthopaedic surgeon specializing in Sports Traumatology and Joint Reconstruction Surgery at The Hospital for Special Surgery and NewYork-Presbyterian Hospital. He also holds an appointment at the Weill Cornell Medical College as an Assistant Professor. Regional interests include the knee, shoulder and hip. He has particular interests in ligament reconstruction of the knee with extensive experience in multi-ligament reconstructions, cartilage and meniscal repair of the knee, arthroscopic shoulder surgery including labral and rotator cuff repairs, and arthroplasty of the knee, shoulder and hip. He frequently lectures on these interests both domestically and internationally.

His areas of experience include:

  • Ligament reconstruction of the knee
  • Multi-ligament reconstructions
  • Cartilage and meniscal repair of the knee
  • Arthrospcopic shoulder surgery
  • Labral and rotator cuff repairs
  • Arthroplasty of the knee, shoulder, and hip

Dr. DiFelice was born and raised in northern New Jersey. He completed his undergraduate degree at Princeton University while simultaneously earning 3 Varsity letters playing football. He then continued on to New Jersey Medical School, where he graduated as a member of the Alpha Omega Alpha Medical Honor Society. He did his residency in Orthopaedic Surgery at the Hospital for Special Surgery in New York City. He then completed a fellowship in Sports Medicine at Washington University in St. Louis in 2000. While there, he worked as an assistant to the team physicians for the St. Louis Rams, the St. Louis Blues and the St. Louis Cardinals.

Since finishing his training, Dr. DiFelice has been the creator and Director for the division of Sports Medicine and Joint Reconstruction Surgery for the North Bronx Healthcare Network, as well as an Assistant Professor of Orthopaedic Surgery at the Albert Einstein College of Medicine. Prior to his recent return to the Hospital for Special Surgery, he worked in conjunction with the Ranawat Orthopaedic Center at Lenox Hill Hospital since 2005.

Among his many accolades, Dr. DiFelice is also a member of numerous state and national medical societies. His athletic accomplishments are also numerous and range from Division I collegiate football to the US Rugby Super League and international Rugby competitions. As such, patients of his can take comfort in knowing that they are not only being treated by an esteemed physician, but a fellow athlete as well.

Daniel W. Green, MD, FACS, FAAP

Areas of Expertise: Pediatrics
(Tel.: 212-606-1631)

Dr. Green specializes in pediatric orthopaedic surgery and pediatric spine disorders. He is Associate Professor of Clinical Orthopaedic Surgery at Weill Cornell Medical College, Associate Attending Orthopaedic Surgeon at NewYork-Presbyterian Hospital/Weill Cornell Medical Center, and Associate Attending Orthopaedic Surgeon at the Hospital for Special Surgery.

Dr. Green provides emergency treatment of pediatric injuries and orthopaedic consults at NewYork-Presbyterian Hospital/Weill Cornell Medical Center, New York Hospital Queens, and the Hospital for Special Surgery. He previously was a surgeon and assistant professor at Yale University School of Medicine.

Dr. Green received his medical degree from the University of Texas Medical Branch in Galveston, did his residency at the Hospital for Special Surgery in New York, and his fellowship at Children's Hospital in Los Angeles.

His research interests include orthopaedic problems in children with hemophilia and the effects of childhood obesity on gait and orthopaedic function. Dr Green also is interested in pediatric Sport injuries and pediatric knee disorders. He is certified by the American Board of Orthopaedic Surgery.

David L. Helfet, MD

Areas of Expertise: Medical-Orthopaedic Trauma Service (fractures)
(contact info.)

Dr. David L. Helfet is Professor of Surgery (Orthopaedics) at Weill Cornell Medical College. He is also Attending Orthopaedic Surgeon at NewYork-Presbyterian Hospital/Weill Cornell Medical Center, and Attending Orthopaedic Surgeon and Chief of Combined Orthopaedic Trauma at the Hospital for Special Surgery.

Dr. Helfet's expertise includes fractures of the upper and lower extremities (shoulder, upper arm, elbow, forearm, hip, upper leg, knee, lower leg and ankle); non-unions (broken bones that do not heal) and malunions (poorly healed broken bones) including correction of deformity; fractures of the pelvis and acetabulum (socket of the hip joint); management of complex fractures; and minimally invasive fracture surgery.

Dr. Helfet completed his undergraduate studies at the University of Cape Town (South Africa), receiving a BSc in biochemistry with honors, followed by medical school, where he received a M.B.CH.B. degree in 1975. He performed his internship and surgical residency at Edendale Hospital in Pietermaritzburg, South Africa and at Johns Hopkins University in Baltimore, MD. He did his orthopaedic residency training at Johns Hopkins University, and fellowship training at the University of Bern, Insel Hospital (1981) and at UCLA (1981-82).

He was previously Assistant Professor of Orthopaedic Surgery at Johns Hopkins University School of Medicine, Associate Professor and Chief of Orthopaedic Trauma at the University of South Florida School of Medicine/Tampa General Hospital and at Weill Cornell Medical College. He is certified by the American Board of Orthopaedic Surgery.

Joseph M. Lane, MD

Areas of Expertise: Metabolic Bone Disease and Osteoporosis, Orthopedic Oncology, Medical-Orthopaedic Trauma Service (fractures)
(contact info.)

Dr. Joseph M. Lane is an Assistant Dean and Professor of Orthopaedic Surgery at Weill Cornell Medical College, and an Assistant Dean, Chief of the Metabolic Bone Disease Service, and Attending Orthopaedic Surgeon at the Hospital for Special Surgery. He is also Attending Orthopaedic Surgeon at NewYork-Presbyterian Hospital/Weill Cornell Medical Center.

Dr. Lane's clinical interests include orthopaedic surgery, bone and soft tissue tumors, osteoporosis, Paget's Disease, adult spine and hip trauma, non-unions (broken bones that fail to heal), and spinal surgery.

Dr. Lane received his AB degree (Magna Cum Laude) from Columbia College and his M.D. from Harvard Medical School. He performed his general surgical internship and residency and three-year orthopaedic residency at the Hospital of the University of Pennsylvania.

Dr. Lane was the Elsee Butz Assistant Professor (Orthopaedics) at the Hospital University of Pennsylvania and Children's Hospital of Philadelphia (1973-75). He was appointed Assistant Professor and Chief of the Metabolic Bone Disease Service at the Hospital for Special Surgery at Cornell University's medical school in 1975, ultimately attaining full Professorship, Assistant Dean, Director of Clinical Research, and Medical Director of the Metabolic Bone Disease Service and Osteoporosis Prevention (1976-93, 1996 - present). He was appointed Chief of the Bone Tumor Service (osteogenic sarcoma, Ewing's sarcoma) at the Memorial Sloan-Kettering Cancer Center (1976-91) and Senior Attending (1991-93). From 1993-96 he was Professor and Chairman of the Department of Orthopaedic Surgery at UCLA.

His group is the first in the United States to investigate the direct insertion of prosthetics into bone without the need of a socket for amputees. He is certified by the National Board of Medical Examiners and American Board of Orthopaedic Surgeons.

Dean G. Lorich, MD

Areas of Expertise: Foot and Ankle, Medical-Orthopaedic Trauma Service (fractures)
(contact info.)

Dr. Dean G. Lorich is Director of the Orthopaedic Trauma Service at NewYork-Presbyterian Hospital/Weill Cornell Medical Center. He is also appointed at the Hospital for Special Surgery, and is Assistant Professor of Orthopaedic Surgery at Weill Cornell Medical College and member of the teaching faculty of the AO/ASIF, an international orthopaedic educational organization.

After completing his residency at The University Hospital of Pennsylvania in 1995, Dr. Lorich completed a fellowship in Orthopaedic Trauma at the Hospital for Special Surgery in 1996. Dr. Lorich was selected for the prestigious Martin Allgower Traveling Trauma Fellow under Rheinhold Ganz, MD, in Bern, Switzerland, and Christian Krettek, MD, in Hanover, Germany. He continues to be actively involved in orthopaedic research while lecturing nationally and internationally. His areas of interest include hip, shoulder and ankle fractures, geriatric fractures, and the relationship of the osteoporosis drug Fosamax to fractures.

Dr. Lorich was recruited to the Hospital for Special Surgery from Albert Einstein School of Medicine, where he was Chief of Orthopaedic Trauma and Director of Orthopaedics for five years. He is certified by the American Board of Orthopaedic Surgery.

John P. Lyden, MD

Areas of Expertise: Medical-Orthopaedic Trauma Service (fractures)
(contact info.)

Dr. John Lyden is Associate Professor of Clinical Surgery at Weill Cornell Medical College. He is Associate Attending Orthopaedic Surgeon at NewYork-Presbyterian Hospital/Weill Cornell Medical Center and the Hospital for Special Surgery, and Assistant Attending Orthopaedic Surgeon at Memorial Sloan-Kettering Cancer Center.

Dr. Lyden's expertise is in fractures and joint replacement. He is Orthopedic Surgeon to the New York City Police Department.

He received his MD degree from Columbia University College of Physicians and Surgeons. He did his general surgical residency at Roosevelt Hospital (1966-67); was stationed at Bethesda Naval Hospital, United States Navy Medical Corps, Lt. Commander (1967-68); First Medical Battallion, First Marine Division Da Nang, South Vietnam, United States Navy Medical Corps, Lt. Commander (1968-69); and was an orthopedic resident at Hospital for Special Surgery (1969-1972). He completed a fellowship in hand surgery at Hospital for Special Surgery, Fellowship in Hand Surgery (1972-73).

He is certified by the American Board of Orthopedic Surgery.

Shevaun Mackie Doyle, MD

Areas of Expertise: Pediatrics
(Tel.: 646-797-8816)

Dr. Doyle specializes in general pediatric orthopaedics, pediatric orthopaedic trauma, pediatric and adolescent metabolic bone disease, and scoliosis. She is Associate Professor of Orthopaedic Surgery at Weill Cornell Medical College, Associate Attending Orthopaedic Surgeon at NewYork-Presbyterian Hospital/Weill Cornell Medical Center, and Assistant Attending Orthopaedic Surgeon at the Hospital for Special Surgery.

Dr. Doyle received her MD degree from New York Medical College. After completing her residency in orthopaedic surgery at the Hospital for Special Surgery (HSS) and her fellowship in pediatric orthopaedic surgery at duPont Hospital for Children, she spent nine years practicing privately as a pediatric orthopaedic surgeon. In 2007, she returned to HSS as a member of the Pediatric Orthopaedic Service.

Her research interests center on metabolic bone disease and bone density in children. She is certified by the American Board of Orthopaedic Surgery.

Rock G. Positano, DPM, MSc, MPH

Areas of Expertise: Non Surgical Foot and Ankle Care, Prescription Foot and Ankle Orthotics, Sports Medicine
(contact info.)

Dr. Rock G. Positano is Director of The Foot Center at NewYork-Presbyterian Hospital/Weill Cornell Medical Center, Clinical Assistant Professor at Weill Cornell Medical College, and Director of the Non-surgical Foot and Ankle Service at the Hospital for Special Surgery. He is nationally known for his non-surgical approach for the treatment of foot disorders.

Dr. Positano is also Adjunct Professor in the Department of Applied Biomechanics at the Albert Nerken School of Engineering at The Cooper Union for the Advancement of Science and Art, and Clinical Professor at the Foot Clinics of New York and the New York College of Podiatric Medicine. He is also a foot and ankle consultant for the New York Mets and New York Giants.

Dr. Positano received his MPH from the Yale School of Medicine, his DPM from the New York College of Podiatric Medicine and his MSc from the NYU School of Medicine. He completed fellowships at the Foot Clinics of New York, the Yale School of Medicine, and the NYU Medical Center – Institute of Environmental Medicine.

Anil S. Ranawat, MD

Areas of Expertise: Hip, Sports/Soft Tissue Trauma, Medical-Orthopaedic Trauma Service (fractures)
(contact info.)

Dr. Anil Ranawat is Assistant Professor of Orthopaedic Surgery at Weill Cornell Medical College and Assistant Attending Orthopedic Surgeon at the Hospital for Special Surgery. He performs hip, knee and shoulder arthroscopy, as well as anterior cruciate ligament (ACL) surgery, meniscal surgery to repair torn meniscus cartilage in the knee, femoro-acetabular impingement (FAI) surgery to correct too much friction in the hip joint, osteotomies surgery to change a bone's alignment or shorten or lengthen it, partial and total joint surgery, and fracture surgery.

His clinical and research interests are focused on joint-preservation surgery of the knee and hip. He also has special expertise in young adult hip disease and ACL and ligament surgery. Additionally, Dr. Ranawat has a deep interest in robotic surgery, partial knee replacement and mobile-bearing technology.

Dr. Ranawat began his academic study at Duke University, where he attained numerous academic honors. He attended medical school at Weill Cornell Medical College and completed his residency at the Hospital for Special Surgery. He completed a University of Pittsburgh Sports Medicine Fellowship in 2007 and a Maurice Müeller Traveling Hip Fellowship in Zurich, Switzerland in 2008. He is certified by the American Board of Orthopaedic Surgery.

David M. Scher, MD

Areas of Expertise: Pediatrics
(contact info.)

Dr. Scher's practice focuses on the musculoskeletal care of children. This discipline includes the entire scope of orthopaedic disorders that can affect children, ranging from fractures and sports injuries to complex congenital and developmental anomalies such as hip dysplasia, clubfeet and cerebral palsy. As an orthopaedic surgeon for children, Dr. Scher has received specialized training in the management of children's musculoskeletal disorders. He is Associate Professor at Weill Cornell Medical College and Associate Attending Orthopaedic Surgeon at NewYork-Presbyterian Hospital/Weill Cornell Medical Center and the Hospital for Special Surgery.

He received his medical degree from Duke University School of Medicine, served his internship at NYU Medical Center, his residency in orthopaedic surgery at NYU's Hospital for Joint Diseases, and his fellowship in pediatric orthopaedic surgery at the Children's Hospital and Health Center in San Diego.

Dr. Scher's research centers on pediatric fractures. He is certified by the American Board of Orthopaedic Surgery.

Ernest L. Sink, MD

Areas of Expertise: Pediatrics
(Tel.: 212-746-4500)

Dr. Sink specializes in the treatment of hip disorders in patients ranging from newborns to young adults. He is the Co-Director of Hospital for Special Surgery's Center for Hip Pain and Preservation and an Associate Attending Orthopaedic Surgeon at NewYork-Presbyterian/Weill Cornell Medical Center. Dr. Sink performs hip procedures in infants, adolescents and young adults, including periacetabular osteotomies (PAO) and surgical hip dislocations. Dr. Sink has authored over 17 peer reviewed articles and six book chapters, and has particular academic and research interest in the areas of pediatric hip disorders and trauma.

Dr. Sink graduated from Texas Southwestern Medical School, where he went on to complete his orthopedic residency training. He completed his fellowship training at Rady Children's Hospital in San Diego and pursued post-fellowship study of innovative hip procedures in both the United States and Europe, including Bern, Switzerland with Professor Reinhold Ganz, who pioneered these techniques. Dr. Sink is involved in teaching other surgeons on a national level and collaborates with several other specialized hip surgeons in the country.

Roger F. Widmann, MD

Areas of Expertise: Pediatrics
(Tel.: 212-606-1325)

Dr. Widmann specializes in pediatric orthopaedics and orthopaedic surgery. He has special expertise in the areas of limb lengthening, hip dysplasia, scoliosis and pediatric orthopaedic trauma. He is Associate Professor of Clinical Orthopaedic Surgery at Weill Cornell Medical College and Chief of Pediatric Orthopaedic Surgery, Co-Chief of the Limb Lengthening Service, and Associate Attending Orthopaedic Surgeon at the Hospital for Special Surgery. He is also the Director of Pediatric Orthopaedic Trauma at NewYork-Presbyterian Hospital/Weill Cornell Medical Center, and is a member of the Scoliosis Service at the Hospital for Special Surgery.

Dr. Widmann completed his medical degree at the Yale University School of Medicine and his orthopaedic surgery residency at the Harvard Combined Orthopaedic Surgery Residency Program based at the Massachusetts General Hospital. He completed his pediatric orthopaedic surgery fellowship training at Children's Hospital in Boston.

Dr. Widmann's research interests include spinal deformity in scoliosis, limb length discrepancies, growth arrest and limb lengthening, and lower limb deformity. He is certified by the American Board of Orthopaedic Surgery.

Contact

Orthopedic Surgery, NewYork-Presbyterian/Weill Cornell
Directions
(212) 746-4500
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