Over 35 years of Experience, Dedication and Innovative Care
Welcome to the practice of General Surgical Associates. With more than 35 years in existence, we
have a long history of providing comprehensive, top quality care to all of our patients. Our
experienced general surgery team formulates a treatment plan that is tailored to each of our
patients' conditions and needs.
Communication is essential to us. We educate our patients on all of their options and address any
questions or concerns they may have. In order to ensure that a patient is receiving the best care
possible, we maintain contact with the primary care physician and other necessary specialists.
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Dr. Michael Cardenas is a native of San Antonio. He graduated from Holmes High School. He earned his undergraduate degree from the University of Texas at Austin and his medical degree from Southwestern Medical School in Dallas. He continued his training with an Internship and Residency in General Surgery at Texas Tech University Health Science Center in Lubbock. Dr. Cardenas also completed an additional Residency in General Surgery at Loyola University Medical Center in Maywood, Illinois.
Board certified by the American Board of Surgery, Dr. Cardenas has been in practice at General Surgical Associates since 1988. He is very active in professional organizations as a Fellow of the American College of Surgeons and a member of the Texas Medical Association and Bexar County Medical Society.
Dr. Cardenas sees patients at our Medical Center location and routinely operates in multiple hospital systems in San Antonio.
Dr. Mark Cheek earned his Bachelor of Business Administration degree in the Honors business program from the University of Texas at Austin, graduating magna cum laude. He completed his medical degree at the University of Texas Medical Branch in Galveston. Dr. Cheek continued his training with a General Surgery Internship and Residency at the University of Arkansas for Medical Sciences in Little Rock, Arkansas. He served as the Vice Chairman of the UAMS Resident Council during his chief year.
Board certified by American Board of Surgeons, Dr. Cheek was in solo private practice from 2012 to 2014 in Monticello, Arkansas. During that time, he served as Chief of Surgery for Drew Memorial Hospital. As of August 2014, Dr. Cheek began his general surgery practice in San Antonio. He is now the newest member of General Surgical Associates. Additionally, Dr. Cheek is an active member of the American College of Surgeons.
Dr. Brad Gurwitz earned his Bachelor of Arts degree with Honors in Biology from the University of Texas at Austin. He completed his medical degree at the University of Texas Medical Branch in Galveston. Dr. Gurwitz continued his training with a Residency at Kansas University Medical Center in Kansas City, where he was appointed Chief Resident.
Board certified by the American Board of Surgeons, Dr. Gurwitz has been in practice at General Surgical Associates since 1995. He is also an Adjunct Assistant Professor at the University of Texas Health Science Center at San Antonio, and has previously served as Chief of Surgery at Southwest Texas Methodist Hospital and Methodist Specialty and Transplant Hospital. Actively involved in numerous professional organizations, Dr. Gurwitz is a Fellow of the American College of Surgeons, Texas Medical Association and Bexar County Medical Society.
Dr. Gurwitz sees patients at our Medical Center location and routinely operates in multiple hospital systems and surgery centers in San Antonio.
Dr. Travis Holloway earned his Bachelor of Science degree in Microbiology from The University of Texas at Austin prior to moving to San Antonio for his medical school and General Surgery residency training. During this time he also completed a two-year research position funded by an NIH grant and received a Masters Degree in Clinical Investigation. Dr. Holloway joined General Surgical Associates in 2016. He is an active member of the Texas Medical Association, the Bexar County Medical Society, and the J. Bradley Aust Surgical Society. During his chief resident year, he was awarded the Raleigh Ross Scholarship through the Texas Surgical Society and has been a resident/fellow member of the American College of Surgeons since 2009. Dr. Holloway has also published multiple research articles in peer-reviewed journals and was also an editor for an online textbook on breast cancer.
Dr. Holloway is accepting patient appointments at our Medical Center location and operates in multiple hospital systems in San Antonio.
Dr. Thomas Michael Shary, Jr. is a native of San Antonio where he graduated from Churchill High School. He earned a Bachelor of Science degree in Biology with a minor in Genetics from Texas A&M University, graduating summa cum laude, and a medical degree from the University of Texas Health Science Center at Houston, where he was inducted into both the Phi Beta Kappa and Alpha Omega Alpha honor societies, respectively. Dr. Shary continued his training with an Internship and Residency in General Surgery at the Medical University of South Carolina. Dr. Shary then went on to complete additional training in a Surgical Critical Care and Trauma Fellowship at the Medical University of South Carolina.
Dr. Shary sees patients at our Medical Center clinic location. Dr. Shary routinely operates in multiple hospital systems in San Antonio.
Dr. Daniel Vargas earned his Bachelor of Science degree in Biology from Trinity University in San Antonio, Texas, and his medical degree from the University of Texas at Houston. He continued his training with a Residency at the University of Texas Health Science Center at San Antonio.
Board certified in General Surgery by the American Board of Surgery, Dr. Vargas has been in private practice since 2009 and has been with General Surgical Associates since 2011. He is an active member of the American College of Surgeons, Texas Medical Association and Bexar County Medical Society Association. Dr. Vargas has authored several articles that have been published in prominent, peer-reviewed journals. He is also fluent in both English and Spanish.
Dr. Vargas conveniently sees patients at our Medical Center and Westover Hills locations. In addition, he routinely operates in multiple hospital systems in San Antonio and surrounding areas.
Dr. Sarah Weakley earned her Bachelor of Arts degree and graduated cum laude from Columbia University in New York City. She earned her medical degree from the University of Texas-Houston Medical School, where she was inducted into the Alpha Omega Alpha honor society. She continued her training with a Residency in the Michael E. DeBakey Department of Surgery at Baylor College of Medicine in Houston, Texas. During this time, she completed a two-year research fellowship on a T-32 training grant.
Dr. Weakley has been in practice with General Surgical Associates since 2014. She is a member of the Texas Medical Association and Bexar County Medical Society. She is a San Antonio native.
Dr. Russell Woodard earned his Bachelor of Science degree summa cum laude in Biology from Christian Brothers College in Memphis, Tennessee, and his medical degree from the University of Tennessee Medical School in Memphis, where he was selected for Alpha Omega Alpha Honor Medical Society. He continued his training with a General Surgery Internship and Residency at the University of Texas Health Science Center at San Antonio.
Board certified by the American Board of Surgery, Dr. Woodard has been in practice at General Surgical Associates since 1993. He is also an Adjunct Professor of Surgery at the University of Texas Health Science Center at San Antonio. Dr. Woodard has previously served as Medical Director of Trauma, Chairman of the Department of General Surgery, and Chief of Staff at Southwest Texas Methodist Hospital. He also serves as the Chairman of Medical Board for the Methodist Healthcare System. He is a Fellow of the American College of Surgeons as well as a member of the J. Bradley Aust Surgical Society, Texas Medical Association and Bexar County Medical Society. He is dedicated to updating his knowledge of the latest advancements in his field and frequently participates in continuing medical education courses around the country.
Dr. Woodard sees patients at our Medical Center location and routinely operates in multiple hospital systems in San Antonio.
Breast cancer is the second leading cause of cancer deaths in women and affects one in every eight women in the United States. If a diagnosis of breast cancer has been made, your doctor can recommend which type of surgery is best for your individual case and discuss all options with you.
A mastectomy is a procedure to remove the breast in patients with breast cancer. This is one of the most commonly used treatment options for breast cancer, as it effectively removes all traces of cancer and reduces a patient's risk of recurrence. Also known as breast-conserving or breast-sparing surgery, lumpectomy is a surgical procedure that removes cancerous or abnormal breast tissue. While mastectomy removes the entire breast, lumpectomy only removes a portion of the breast, keeping its overall appearance intact. Breast reconstruction is a procedure performed after a mastectomy to offer patients psychological and aesthetic benefits when recovering from breast cancer.
To read more about Breast Cancer Surgery, click here.
Colorectal surgery is often the recommended course of treatment for certain diseases such as colorectal cancer, diverticular disease, intestinal blockage due to scar tissue, ulcerative colitis that does not respond to medication, traumatic injuries and polyps. Polyps are a small cluster of cells that form on the lining of the colon or the large intestine. Most polyps are not cancerous and are simply a result of abnormal cell growth, but some can gradually turn into colon cancer, so regular screening and removal of all polyps is important.
Prior to colorectal surgery, the colon may need to be cleaned with an enema or oral agent. Then, the patient is put under general anesthesia. A series of small incisions are made in the abdomen through which an endoscope and surgical instruments are inserted. Working through these tiny incisions with the help of the endoscopic camera, the surgeon removes the diseased intestine and sews the remaining ends together. The incisions are then stitched closed. After undergoing colorectal surgery, most patients return home within a week. Full recovery generally takes up to two months.
The endocrine glands are responsible for secreting hormones in our bodies. These glands include the thyroid in the front of the neck, four parathyroids behind the thyroid, two adrenal glands near each kidney, neuroendocrine glands in the pancreas, and the pituitary gland in the brain. Endocrine surgeons have special expertise in operating on the endocrine glands when they produce abnormal and harmful amounts of hormones. Surgical removal of all or part of an endocrine gland is often an effective treatment for cancer and benign tumors, cysts, nodules, parathyroid adenoma, Grave’s disease, Cushing’s Syndrome, Conn’s Disease and pheochromocytoma.
Hepatobiliary surgery is used to treat disorders of the liver, bile ducts, and gallbladder. Disorders include congenital abnormalities, inflammations, traumatic injuries, gallstones, and benign and malignant tumors. During hepatobiliary surgery, the surgeon removes the unwanted masses, such as gallstones or cancerous parts of hepatobiliary organs.
Hepatobiliary surgery may be performed laparoscopically and has many of the benefits of other laparoscopic surgeries. This minimally invasive procedure provides patients with shorter hospitalization, a faster recovery, smaller scars, and less post-operative pain.
General surgery is a medical specialty that necessitates its practitioners have a broad knowledge of many conditions and the effects they may have on the body. General surgeons are well equipped to diagnose and treat a wide variety of ailments. They receive extensive training after medical school, with hands-on residencies that give general surgeons practical, in-depth experience working on the digestive system, skin, breasts, organs of the abdomen and more to prepare them to perform complex surgeries of all types.
One area of general surgery in which we specialize is hernia repair. This can encompass a simple hernia repair—performed laparoscopically if possible—to push tissue that is protruding through an opening in the abdomen, groin or naval area back into place. It may also be highly complex surgery if the abdominal wall requires reconstruction. Once the tissue is returned to its original location, the weakened area of the wall must be strengthened with stitching or synthetic mesh to prevent the formation of another hernia.
Laparoscopy is a minimally invasive surgical procedure used to diagnose and treat problems of the abdominal and pelvic areas. During this procedure, an endoscope (tube) with a camera on the end is inserted through a tiny incision to allow your doctor to closely examine the organs of the area. Surgical instruments can be inserted through additional incisions to treat any identified problems.
This procedure may be performed for a number of reasons, including to:
- Perform a biopsy
- Examine and possibly remove any growths (such as tumors)
- Check for metastasis (spreading) of cancer from other areas
- Repair a hernia
- Remove organs such as the spleen, gallbladder or appendix
Laparoscopy is performed under general anesthesia and takes 30 to 90 minutes, depending on what is done during the procedure. Patients can usually go home shortly after the procedure and return to work and other normal activities the next day. Strenuous activity should be avoided for about a week. Laparoscopy is considered a safe procedure with little risk of complications.
We specialize in advanced laparoscopic procedures for the following:
- Gastroesophageal Reflux Disease (GERD)
- The Spleen
- The Adrenal Gland
- The Colon
Sometimes the most effective way to treat a malignant tumor is to surgically excise (remove) the diseased tissue. A general surgeon may be chosen for this task when the cancer is present in the breast, gastrointestinal (GI) tract, liver or endocrine system, and potentially for melanoma and sarcoma as well. Once the tumor has been removed, additional therapies may be recommended to lower the chance of recurrence. These treatments may include radiotherapy, chemotherapy, or ultrasound or laser surgery. Early detection and the latest techniques and technologies are used to achieve the best possible outcome.
Fundoplication, commonly known as reflux surgery, is a surgical procedure used to correct problems of the lower esophageal sphincter (LES) associated with gastroesophageal reflux disease (GERD). It may also be used on patients with esophagitis or to repair a hiatal hernia. This procedure prevents acid from traveling back into the esophagus by strengthening the valve between the esophagus and stomach.
During fundoplication, the fundus (the upper part of the stomach) is wrapped around a band of muscles at the base of the esophagus and sewn into place. This helps strengthen the LES muscles and increases pressure on them, preventing reflux from occurring. The LES muscles are supposed to open when food is present in the esophagus, in order to let it into the stomach, but is supposed to close once the food has entered, serving as a one-way valve. In many people, the valve is not strong enough to stay closed and acid may flow back into the esophagus, causing irritation and inflammation of the lining.
The structures of our musculoskeletal system - the bones, joints, ligaments, tendons and other tissues - are highly susceptible to damage caused by trauma from accidents, injuries and other events. These traumatic events may include a fall, automobile accident or sports injury, and often involve a direct blow or twisting on a specific area of the body, causing pain, swelling, inflammation, and other sometimes serious complications.
Robotic-assisted surgery is the least invasive and often most effective procedure available. Addressing the shortcomings of other types of surgery, robotic surgery offers many advantages to both patient and doctor. It combines the effective control of open surgery with the less invasive approach of laparoscopy.
Robotic-assisted surgery is usually performed with the da Vinci® Surgical System, a console made by Intuitive Surgical that is considered the best in these types of procedures. The system is comprised of a surgeon console, where the surgeon sits and operates the master controls as he views the operating area through real-time images; the patient-side cart, which has four robotic arms that actually perform the procedure as well as provide images for the surgeon; and the EndoWrist instruments, which are the tools that perform the intricacies of the procedure and are completely controlled by the surgeon.
This approach offers patients effective treatment of their condition as well as:
- Less pain
- Less bleeding
- Less scarring
- Shorter recovery time
- Lower risk of infection