Colorectal and General Surgery
Nathaniel Ng, M.D., is an assistant professor in the Department of Surgery. He earned his medical degree from the University of Texas Medical Branch at Galveston.
Dr. Ng went on to complete a residency in general surgery at Texas Tech University Health Sciences Center El Paso. Following residency, Dr. Ng completed a colon and rectal surgery fellowship at the University of Texas Health Science Center at Houston McGovern Medical School. His clinical interests include the evaluation, diagnosis and treatment of diseases of the colon, rectum and anus.
James Nelson, M.D., earned his M.D. from the Creighton University School of Medicine in Omaha, Nebraska. He was awarded the Army Meritorious Service Medal for his nine years of exemplary active duty military service.
James Nelson, M.D., is a board-certified orthopaedic surgeon with an affinity for treating sports injuries. Dr. Nelson received a B.A. in chemistry from Augustana College in Sioux Falls, SD. He was awarded a United States Army Health Professionals Scholarship and earned his M.D. from the Creighton University School of Medicine in Omaha, NE. Dr. Nelson completed his internship and residency at the William Beaumont Army Medical Center through Texas Tech University Health Sciences Center El Paso's Orthopaedic Surgery and Rehabilitation program. Following Residency, Dr. Nelson served three years at Martin Army Community Hospital and deployed to Afghanistan. He finished his time with the Army at William Beaumont Army Medical Center, training residents. Dr. Nelson was awarded the Army Meritorious Service Medal for his nine years of exemplary active duty military service. Dr. Nelson employs cutting-edge technology to compassionately treats many orthopedic conditions and is excited to share his experience with the TTUHSC El Paso and El Paso community.
Patricia Nelson, M.D., FACS, earned her M.D. from the Penn State College of Medicine with a U.S. Army Health Professions Scholarship.
Dr. Nelson completed an internship at William Beaumont Army Medical Center and a residency in ophthalmology in San Antonio. She then served four years as an ophthalmologist at Martin Army Community Hospital in Fort Benning, Georgia. During this time, Dr. Nelson was promoted to the rank of major, named chief of ophthalmology, served with the American Board of Ophthalmology to set exam standards, and helped initiate a partnership with the Alabama Department of Veterans Affairs. Most recently, Dr. Nelson was inducted as a fellow of the American College of Surgeons and awarded the Army Meritorious Service Medal for eight years of exemplary active-duty military service.
Erica Renee Alvarez, M.D., is an instructor in the Department of Surgery. She earned her M.D. from TTUHSC El Paso's own Paul L. Foster School of Medicine. Her speciality is ophthalmology with subspecialty training in medical retina and ocular oncology.
Dr. Erica Renee Alvarez graduated from the Texas Tech University Health Sciences Center Paul L. Foster School of Medicine in El Paso, Texas. She completed her internship in internal medicine at the University of Chicago, her ophthalmology residency at Howard University Hospital in Washington, D.C., and her fellowship training at The Ohio State University. Dr. Alvarez is an El Paso native, bilingual in Spanish, and accepting new patients now.
Dr. Alvarez offers her expertise in treating cancers of the eye, including primary vitreoretinal lymphoma, uveal melanoma, conjunctival melanoma, leukemic retinopathy, ocular side effects of cancer treatments, as well as metastatic diseases to the eye. She is trained in the latest techniques for treatment, including intraoperative and in-office intravitreal chemotherapy injections. She is proficient in the placement of brachy radiation therapy plaques and transpupillary thermotherapy for treatment of uveal melanoma. She offers fine-needle aspiration biopsies, and transcleral biopsies for identification of tumor genetic markers and overall prognostication. For larger tumors, she is competent in surgical removal via enucleation. She has worked with radiation oncology and is competent in following patients as they receive external beam radiation for treatment of metastatic lesions, as well as cancers such as diffuse B-cell lymphoma.
As a retina specialist, Dr. Alvarez has experience in treating diabetic eye diseases, macular degeneration, uveitis, autoimmune retinopathy and numerous vascular and proliferative diseases of the retina. She offers services in screening for plaquenil or hydroxychloroquine toxicity. She is knowledgeable in Von Hippel Lindau disease and the different ophthalmic lasers for adequate treatment of hemangioblastomas. She not only offers intravitreal injections with steroids and anti-VEGF medications, but is also well-versed in numerous ophthalmology laser treatments, which she tailors to each patient’s individual needs.
Ioannis Konstantinidis, M.D., was born and raised in Greece. He graduated from the Aristotle University of Thessaloniki Medical School.
Dr. Konstantinidis moved to the U.S. and completed a research fellowship on pancreatic and biliary cancer and a surgical internship at Massachusetts General Hospital before he completed his general surgery training at the University of Arizona. During his residency, he completed a research fellowship on pancreatic and hepatobiliary cancers at Memorial Sloan-Kettering Cancer Center. He continued his advanced training in complex surgical oncology and robotic surgery at City of Hope National Cancer Center with Dr. Yuman Fong.
Dr. Konstantinidis has written several peer-reviewed articles on pancreatic and hepatobiliary cancers and has received several awards, including an American Cancer Society Merit award.
Dr. Konstantinidis' services include treatment of malignant and benign tumors of the gastrointestinal tract including liver, pancreas, gallbladder, bile ducts, stomach, small bowel, appendix; melanoma and sarcoma surgery; robotic assisted surgery; cytoreductive surgery with hyperthermic intraperitoneal chemotherapy (CRS-HIPEC); and general surgery.
Dr. Alkhalili (Pronounced al-ka-li-li) is an assistant professor of surgery at Texas Tech University Health Sciences Center El Paso and Transmountain Hospital. He graduated from medical school at the University of Jordan in Amman, Jordan.
Dr. Alkhalili completed his internship in general surgery at the Johns Hopkins Hospital then finished his residency training at the University of New Mexico Health Sciences Center. He then completed his endocrine surgery fellowship at the Johns Hopkins Hospital. Dr. Alkhalili is dedicated to the surgical care of patients with disorders of the thyroid, parathyroid, and adrenal glands.
Dr. Alkhalili's services include:
- Diagnosis and workup of thyroid nodules including thyroid ultrasound and fine needle aspiration biopsy (FNA).
- Thyroid and parathyroid surgery including thyroidectomy, parathyroidectomy, neck dissection, and the transoral endoscopic “scar-free” approach to the thyroid and parathyroid glands.
- Workup of adrenal incidentalomas and nodules.
- Minimally invasive (laparoscopic) and open adrenalectomy.