Our Doctors

Dr Christos Apostolou
MBChB (UCT), FCS (SA), MMed (Surg), FRACS
Gastric & Oesophageal Surgery,
Hepatobiliary & Pancreatic Surgery,
General Surgery, Robotic Surgery

Specialist Profile
Dr Christos Apostolou is a specialist General Surgeon in the fields of upper gastrointestinal, liver, biliary and pancreatic surgery. Graduating from the University of Cape Town in 1996, he undertook surgical training and qualified as a General Surgeon in South Africa in 2003, continuing with fellowships in tertiary trauma and hepatopancreaticobiliary and digestive surgery. He was subsequently appointed as a Visiting Consultant at Groote Schuur Hospital and Honorary Lecturer in Surgery and established a successful private practice in Cape Town. In 2011-12, he worked as a fellow in Upper GI Surgery in the busy South Western Sydney Area Health Service, culminating in admission to the Royal Australasian College of Surgeons. 

Dr Apostolou has expertise in treatment of hepatopancreaticobiliary and oesophagogastric malignancies, and is well versed in emergency surgery and the minor aspects of general surgery. He has trained in laparoscopic and open surgery as well as diagnostic and interventional endoscopy, and has completed his Masters in the treatment of pancreatic pseudocysts. 

Dr Apostolou has an interest in teaching students and registrars. He is currently a Conjoint Senior Lecturer at the University of New South Wales, and a Clinical Lecturer at Macquarie University and the Australian School of Advanced Medicine.


Dr Walid Barto
Robotic Colorectal Surgery
Head of General Surgery, Sydney Adventist Hospital

Dr Walid Barto is a specialist colorectal surgeon. He obtained his medical degree at the University of Sydney and continued with advanced surgical training at St Vincent’s Hospital. He was awarded the Royal Australasian College Fellowship in 2009. He undertook additional training in colorectal surgery at The Alfred Hospital, Melbourne and at Westmead Hospital in 2010 as a fellow of the Colorectal Surgical Society of Australia and New Zealand.

Dr Barto has a strong interest in minimally invasive colorectal surgery. In additional to advanced laparoscopic surgery, he is skilled in Robotic surgery using the Da Vinci system and the Flex Robotic System as an operator and trainer. He was the first colorectal surgeon in the Southern Hemisphere to use the Flexible Robotic Surgery (Flex Robot) in the treatment of rectal tumours.

He also holds a patent in surgical instrument design and has numerous publications and research in the field of colorectal surgery. Dr Barto works closely with gynaecologists in the surgical management of advanced (stage 4) endometriosis and pelvic malignancies. He is a member of the Multidisciplinary Cancer Care Team.

Dr Barto is a member of the Gastroenterological Society of Australia, the Australian Medical Association, the Colorectal Surgical Society of Australia and New Zealand. Dr Barto is currently the head of department of General Surgery and Sub speciality at the Sydney Adventist Hospital and the Chairman of the Nepean Hospital Research Meeting. He a strong healthcare advocate and has been interviewed on 2GB and SBS radio.

Dr Sulman Ahmed
MBBS (syd), MS (syd), FRACS
General & Hepatobiliary Surgeon

Dr. Sulman Ahmed is a General and Hepatobiliary surgeon.

Sulman grew up in Sydney, and attended Trinity Grammar School (1980-1991). He completed his HSC in 1991. Sulman then went on to complete his medical studies at the University of Sydney; graduating in 1998.

Sulman then completed his general surgical fellowship in 2007. He has then undertaken 3 years of further subspecialty training in Hepatobiliary surgery.

Sulmans general surgical interests include gastroscopy, colonoscopy & ERCP. Sulman also performs arrange of laparoscopic surgery including inguinal hernia surgery, gallbladder surgery, fundoplication and adrenal surgery. Other surgical interests include umbilical/ventral hernia repairs, circumcisions, ingrown toe nail surgery, plus lumps & bumps.

Special Interests:
Sulman has a special interest in Liver Cancer, and this forms his major subspecialty practice.

1998 MBBS (University of Sydney)
2007 FRACS (Royal Australasian College of Surgeons)
2010 Masters in Surgery (Upper Gastrointestinal Surgery)

Courses Attended:
Fellowship training in hepatobiliary surgery – ANZHPBA
Officer training – Royal Australian Army corps. Rank Of Captain.
Trainer Course for surgical trainees (RACS-2009)

Dr Ahmed welcomes any enquiries from General Practitioners and other allied health professionals regarding their patients. 



General surgery and endoscopy

  • Hernia Surgery: laparoscopic, robotic, open
  • Cholecysctomy: laparoscopic, robotic, open
  • Gastroscopy, colonoscopy, ERCP

Colorectal Surgery

  • Minimally invasive and robotic surgery for Colorectal cancer
  • Doppler guided haemorrhoid artery ligation for treatment of haemorrhoids (piles)
  • Day procedure Pilonidal sinus surgery
  • Upper endoscopy and colonoscopy
  • Robotic hernia repair
  • Advanced endometriosis surgery (combined with Gynaecology team)

HPB and Pancreatic Surgery

  • Liver resection
  • Pancreatectomy
  • Complex cholecysctomy

Upper Gastrointestinal Surgery

  • Antireflux Surgery
  • Gastric and oesophageal cancer surgery

Bariatrics Surgery

Bariatric surgery or weight loss surgery is indicated specifically for patients with BMI > 30 with medical co-morbidities (eg Diabetes/high blood pressure/arthritis/sleep apnoea/ high cholesterol etc) or a BMI > 35.

There are a number of surgical options:

  • Gastric sleeve surgery – the most common procedure being done worldwide.
  • Gastric bypass surgery – this has 2 types – a) the mini bypass and b) the roux en y bypass.
  • Revision surgery – this is a 2nd or subsequent procedure after a patient has had a previous bariatric surgery – usually a lap band placed.
  • Removal of lap band .
  • Endoscopic treatment for obesity : ESG/balloons.
We offer an in-house dietitian service through the SAN – Ms. Amy Boidin.
Further information can ben found at  www.nepeanweightloss.com.au; or email: reception@nepeansurgery.com.au


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