Ahmed Sawas, MD

Dr. Marc Bessler is the United States Surgical Professor of Surgery at Columbia University Medical Center. A fellow of the American College of Surgeons, Dr. Bessler's clinical specialties include laparoscopic and single incision bariatric surgery...

Rajshekhar Chakraborty, MD is an assistant professor of medicine at Columbia University Irving Medical Center in the division of hematology/oncology. After receiving his medical degree from University of Delhi, India, he completed his residency in internal medicine at Icahn School of Medicine at Mount Sinai-Queens Hospital Center. Subsequently, he spent three years as a clinical researcher in plasma cell disorders at the Mayo Clinic, Rochester, followed by fellowship in hematology/oncology at the Cleveland Clinic. During fellowship, he conducted outcomes research with a focus on quality of life and treatment-related toxicities in plasma cell disorders. After fellowship, he started his job as Assistant Professor of Medicine at the Multiple Myeloma and Amyloidosis Program at Columbia University Irving Medical Center. Dr. Chakraborty cares primarily for patients with plasma cells disorders, including multiple myeloma, amyloidosis, MGUS, POEMS syndrome, and Waldenstrom’s macroglobulinemia. His research interests include clinical trials and outcomes research in plasma cell disorders.

Wakenda K. Tyler, MD, MPH specializes in the treatment of benign and malignant tumors of the bones and soft tissues in patients of all ages. As a musculoskeletal oncologist, Dr. Tyler’s practice is focused on the non-operative and operative management of primary soft tissue and bone cancers, sarcomas, and metastatic bone cancer. Dr. Tyler’s goal is to provide compassionate surgical care that achieves cure of cancer whenever possible by leveraging the latest advances in non-operative management, minimally invasive, and reconstructive surgical techniques. When cure is not possible she strives to achieve pain control and improve function as best as possible for every patient. Dr. Tyler earned her medical degree from The John Hopkins University School of Medicine, where she also received a masters degree in public health. She went on to complete residency training in orthopedic surgery at the Hospital for Special Surgery, followed by a fellowship in musculoskeletal oncology at the Memorial Sloan Kettering Cancer Center. As an active physician scientist, Dr. Tyler’s research interests overlap with her clinical practice and center around the treatment of patients with bone and soft tissue tumors and conditions that lead to osteolysis (bone destruction as a result of implant wear and loosening or presence of a tumor). She has written medical journal articles on several bone diseases, the effectiveness of medication in penetrating to the site of bone grafts, and the strength of the bone and prosthesis union.