With the formation of the Division of Laparoscopic Surgery in 1992, Mount Sinai was one of the first medical schools in the United States to recognize laparoscopy as a distinct specialty within general surgery. In 2009, the Division of Laparoscopic Surgery evolved into the Division of Metabolic, Endocrine, and Minimally Invasive Surgery. In 2015, the Division underwent another changed and evolved in the “Garlock Division of General Surgery” with the same focus in general, endocrine, bariatric, and minimally invasive surgery.

The Division merges two unique disciplines, laparoscopy and bariatric surgery and endocrine surgery, into a single entity. This interdisciplinary division was formed to recognize the increasing importance of metabolic surgery and to capitalize on the educational and research opportunities presented by the synergy of these two rapidly evolving fields.

Clinical research comprises a large portion of our mission. Faculty members within the Division are renowned as pioneers in the growing field of laparoscopic and minimally invasive surgery.

We are currently involved in the following research:

  • We are evaluating the role of bariatric surgery in patients with diabetes with special interest in a particular population of patients with diabetes type 1.

  • Through the use of data from our extensive experience, we are investigating potential risk factors to improve operative and post-operative outcomes in bariatric surgery.

  • Following our comprehensive and multidisciplinary approach for managing different endocrine tumors, we are seeking to find answers on how to clearly optimize the pre-operative imaging and management of patients with primary hyperaldosteronism. We are also investigating the use and role of preoperative medications in the management and outcome of patients undergoing adrenalectomy for pheochromocytomas.

  • The role of surgeon-performed office and preoperative ultrasounds in the management of patients with primary hyperparathyroidism.

  • We continue to evaluate surgical techniques for thyroidectomy, the development of intra-operative scoring systems, and laparoscopic colon and abdominal surgeries.

  • Surgeons within the Division have designed retrospective studies that seek to analyze pre- and post-operative patient data in order to examine long-term outcomes after surgical interventions, including adrenalectomy and thyroidectomy, and the efficacy of different imaging modalities in the treatment of neuroendocrine tumors and malfunctioning endocrine organs.

For research opportunities and collaboration, please contact Gustavo Fernandez-Ranvier at


Contact Us

Tel: 212-824-2350
Fax: 212-202-4713 or 212-202-4995

The Garlock Division of General Surgery
5 East 98th Street
3rd Floor (Mail Box 1259)
New York, NY 10029

1470 Madison Ave at 101st Street
3rd Floor (Mail Box 1259)
New York, NY 10029