1. Hisar Hospital Intercontinental
Hisar Hospital Intercontinental is a multi-specialty medical center in Istanbul, accredited by the Joint Commission International (JCI) for meeting high standards of treatment quality and safety. The hospital specializes in oncology, hematology, cardiovascular surgery, orthopedics, and bariatric procedures, including gastric sleeve, bypass, and balloon. It also offers comprehensive health check-ups. 
2. Memorial Şişli Hospital
Memorial Şişli Hospital is the largest multidisciplinary medical center in Istanbul and is accredited by Joint Commission International (JCI) for the high quality of treatment. Memorial Şişli specializes in oncology, bone marrow transplant, in vitro fertilization (IVF), neurosurgery, weight loss surgery, including gastric lap banding, and organ transplant. The success rate of organ transplant at Memorial is 90%. 
3. Memorial Bahçelievler Hospital
Memorial Bahçelievler Hospital is a multidisciplinary medical center in Istanbul with an eco-friendly design. The hospital specializes in oncology treatments, cardiovascular surgery, orthopedics, brain surgery, urology, gynecology, general and robotic surgery. 
4. Liv Hospital Ulus
Liv Hospital Ulus offers partial and complete colectomy procedures, utilizing laparoscopic techniques (operation through several incisions up to 2 cm) and open surgery. The hospital also provides da Vinci robotic surgery to treat colon cancer, which is a safe operation through small incisions, helping to avoid postoperative complications, risk of infection, and scars. 
5. Anadolu Medical Center
Anadolu Medical Center is affiliated with Johns Hopkins Medicine International and offers laparoscopic colectomy for patients with colon cancer. Specialists from the General Surgery Department provide minimally invasive techniques for colon tumor removal. 
Cost Considerations:
The cost of colectomy surgery in Istanbul can vary depending on the hospital, the complexity of the procedure, and the patient's specific condition. On average, the cost may range from \$5,000 to \$18,500. It's advisable to contact the hospital directly to obtain a personalized quote and inquire about any available financial assistance or payment options.