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Doctors
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Prof. Adnan Isgor

Prof. Adnan Isgor

General surgeon, endocrine surgeon
5
6 reviews
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Istanbul, Turkey
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Clinical experience: over 45 years
Languages: EnglishTürkçe
Reviews about Prof. Adnan Isgor
Mehmet Yılmaz
Verified review
Mehmet Yılmaz
oncology
I am very pleased with the communication of my doctor Adnan Bey, with clear answers to my [questions].
Ahmet Demir
Verified review
Ahmet Demir
oncology
This is my second operation with Dr. Adnan. Thank God for giving us this doctor.
Dilan Yılmaz
Verified review
Dilan Yılmaz
breast cancer
In 2009, our mother was found to have a mass in her breast. The doctor helped to diagnose it as accurately as possible, successfully performed breast-conserving surgery, and competently organized the entire treatment process.
During regular follow-up examinations, he always showed patience, attention, and support. We have boundless trust in his professionalism and are very grateful to him.

03/11/2022
Hediye Arslan
Verified review
Hediye Arslan
gallstone disease
I met our dear Dr. Adnan Bey after coming from Bolu, and underwent gallbladder removal surgery at the American Hospital in Istanbul. This was back in 1995, when laparoscopic operations were just beginning to be performed.
Now I am 57 years old and have no health problems. Later, my daughter underwent a similar operation, after which we had complications and additional procedures were needed. I am still very grateful to our doctor for his help and support.

17/03/2015
Kübra Demir
Verified review
Kübra Demir
thyroid disease
The doctor performed thyroid surgery on my wife. Many people consider such operations simple, but in fact they can be quite complex and risky depending on the situation.
In our case, everything went well. We thank the doctor for his professionalism, patience, and attentive attitude. We can confidently recommend him to other patients.

28/01/2015
Hediye Kaya
Verified review
Hediye Kaya
thyroid nodules
After thyroid nodules were found in my mother and a doubtful biopsy result, we started looking for a specialist to perform a total thyroidectomy. That's how we found this doctor.
After the operation at Medical Park, my mother had no complications that we were very afraid of — neither voice problems nor damage to the parathyroid glands. The very next day, she could speak and eat normally.
A very experienced specialist whom I can confidently recommend for thyroid surgery.

04/09/2014
General surgeon, endocrine surgeon
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Clinical experience: over 45 years

Adnan Isgor is one of the most experienced Turkish endocrine surgeons, professor of general surgery. He works at Memorial Şişli Hospital in Istanbul.

His main specialization is endocrine surgery — operations on the thyroid gland (including thyroid cancer), parathyroid glands, and adrenal glands. In addition, he is involved in breast surgery, including for breast cancer, and hernia surgery.

During his career, he has performed more than 5,000 surgical operations. This is a serious sample, especially in such delicate areas as thyroid and parathyroid surgery.

He has held a number of leading academic and organizational roles in Turkish surgery: from 1991 to 2004 — head of the Department of General Surgery at Şişli Etfal Training and Research Hospital; from 2012 to 2016 — head of the Department of General Surgery at Bahçeşehir University. He was president of the Endocrine Surgery Foundation in 2010–2012.

He is also a member of leading international surgical associations: American College of Surgeons, International Surgical Society, International Association of Endocrine Surgery, Breast Surgery International. He has published more than 200 scientific articles and co-edited four books on surgery.

According to patient reviews, he is an attentive, professional, and communicative doctor. Patients note accurate answers to questions, successful operations, and good follow-up care.

For a patient with thyroid pathology, thyroid cancer, parathyroid adenomas, adrenal tumors, breast cancer, or a complex hernia — this is a “high school” level surgeon with international authority.

Achievements and awards

More than 5,000 successful surgical operations.
One of the founders of endocrine surgery in Turkey.
13 years — head of the department at Şişli Etfal Hospital.
Member of ACS, ISS, IAES, BSI; 200+ articles.

About Professor Adnan Isgor

Specialization

General surgery; narrow specialization — endocrine surgery and breast surgery.

Areas: thyroid surgery (including for cancer), parathyroidectomy, adrenal surgery, breast cancer surgery, hernia surgery, surgery for digestive system tumors.

Education
  • 1968–1975 — medical degree, Hacettepe University Faculty of Medicine, Ankara.
  • 1975–1980 — specialization in general surgery, Hacettepe University Faculty of Medicine, Department of General Surgery, Ankara.
Clinical experience
  • 1991–2004 — Head of the Department of General Surgery, Şişli Etfal Training and Research Hospital, Istanbul.
  • 2004–2009 — lecturer at the Department of General Surgery, Halic University Medical Sciences Institute, Istanbul.
  • 2008–2016 — specialist in general surgery, Medical Park Göztepe Hospital, Istanbul.
  • 2012–2016 — Head of the Department of General Surgery, Bahçeşehir University Faculty of Medicine, Istanbul.
  • 2016 — present — Memorial Şişli Hospital, Istanbul, specialist in general surgery.
Scientific activity

According to Memorial and MedTour — more than 200 scientific articles in Turkish and international journals, co-author and editor of 4 books.

According to Google Scholar — about 1,025 citations.

According to ResearchGate — 51 publications, 732 citations.

Main research topics: thyroidectomy in benign thyroid diseases, wound complications, cervical thymectomy in secondary hyperparathyroidism, surgery for amyloid goiter, management of unilateral non-toxic goiter, breast surgery.

There are publications in World Journal of Endocrine Surgery, Endocrine Practice, Surgery Today.

Membership in associations
  • American College of Surgeons (ACS)
  • International Surgical Society (ISS)
  • International Association of Endocrine Surgery (IAES)
  • Breast Surgery International (BSI)
  • Istanbul Surgery Association (ICD) — co-founder and vice-president (2 years)
  • Turkish Society of Surgery
  • Endocrine Surgery Foundation (ECD) — president 2010–2012
Memorial Şişli (Memorial Şişli Hospital)
The clinic where the doctor sees patients
Memorial Şişli (Memorial Şişli Hospital)
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Turkey, Istanbul

Memorial Şişli is one of the leading private clinics in Istanbul, the key hospital of the Memorial Hospitals Group network. The network is JCI-accredited, and Şişli is one of its flagships.

The clinic is equipped for the full cycle of diagnosis and treatment:

  • radiological methods (high-resolution ultrasound, CT, MRI, PET-CT),
  • laboratory hormonal tests,
  • nuclear medicine (radioactive iodine after thyroid surgery),
  • oncology department for multidisciplinary council,
  • transplantation (including liver and kidney transplantation).

Modern thyroid and parathyroid surgery at Memorial Şişli includes intraoperative neuromonitoring of the laryngeal nerves to preserve the voice, rapid intraoperative parathyroid hormone determination during parathyroid operations, as well as oncoplastic breast surgery.

Published 25.04.2026, Updated 30.04.2026
Dr Nataliia
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