Special Clinical Focus

  • General surgery and bowel surgery to the abdominal organs.
  • Surgical treatment of inflammatory and tumorous conditions of the entire gastro-intestinal tract.
  • Treatment of abdominal conditions (inguinal hernias / incisional hernias).
  • In collaboration with the Surgical Centre, Zurich: complex tumour surgery to all abdominal organs and application of state-of-the-art techniques such as HIPEC, PIPAC and NanoKnife.

About us

Dr Hani Oweira is a specialist in surgery and bowel surgery and works as a visiting surgeon at the Andreas Hospital, Cham, Zug and as an associated partner at the Surgical Centre, Zurich. He completed his medical training and specialist qualification at the renowned University hospitals in Heidelberg and at the Berlin Charité. Prior to his current position, Dr Oweira held a position as a consultant at the Hirslanden Surgical Centre clinics of the Hirslanden Hospitals.

Dr Oweira’s clinical focus is on the surgical treatment of inflammatory conditions and tumours of the gastro-intestinal tract and hernia surgery (inguinal and incisional hernias). Dr Oweira also possesses great expertise in complex tumour surgery to all abdominal organs. He utilises the most up-to-date techniques applied in the treatment of cancer with the greatest degree of competence and safety. These include HIPEC, PIPAC and the NanoKnife technique.

HIPEC stands for Hyperthermic Intraperitoneal Chemotherapy and this has proven greatly successful in the removal of the smallest vestiges of tumour tissue on the peritoneum. This method takes advantage of the fact that tumour cells are more sensitive to heat than the body’s healthy cells.
Following the surgical removal of the primary tumour, a chemical preparation is heated to over 40° C and is placed in the abdominal cavity. Here, it attacks the remaining tumour cells in particular and kills these off. In this manner, particular tumours can be targeted and treated without the known side-effects due to chemotherapy.

For certain forms of tumour in the abdominal cavity which are not suitable for the HIPEC technique, Pressurised IntraPeritoneal Aerosol Chemotherapy (PIPAC) can produce good results. Here, the medication is introduced to the site in a gaseous form in the course of a laparoscopy. This technique has only been in use since 2011 but has already shown very good results.

Another new and extremely precise technique which Dr Oweira utilises in cancer therapy is the so-called NanoKnife technique. Using very brief and locally sharply delimited current pulses, this can destroy tumour cells in a targeted manner in prostatic cancer, without producing heat and without damaging the surrounding healthy tissue. Hence, side-effects such as incontinence, which frequently appear due to procedures on the prostate gland, can often be avoided.

Thanks to his skill in the practical application of promising new techniques, Dr Oweira is among the pioneers in this field. To date, he has published several contributions in the national and international specialist scientific literature and is also an active participant in relevant European specialist associations.

Leading Medicine Guide, Blog:

Oweira, the Graceful and Trusting

Diagnostic Services

  • Specialist radiology
  • CT (computed tomography)
  • MRI (magnetic resonance Imaging)
  • PET-CT (positron emission CT for imaging metabolic processes)

Therapeutic Services

Oncological bowel surgery (tumour surgery)
  • Surgical treatment of all tumour conditions of the internal organs
  • Total pancreatic surgery
  • Hepatic surgery
  • Palliative Surgery
Surgery to the gallbladder, biliary tract and liver
  • Emergency surgery
  • Elective surgery
  • Tumour surgery
  • Surgery for hepatic metastases
Pancreatic surgery
  • Surgery for chronic inflammation of the pancreas
  • Tumour surgery
Minimally invasive surgery
  • Surgery to the oesophagus, for gastro-oesophageal reflux disease (inflammatory condition of the oesophagus)
  • Gastric surgery
  • Surgery to the small intestine and colon
  • Including surgery for diverticular disease (changes to the colon in the form of small eversions of the intestinal wall)
  • Bowel prolapse and cancer of the colon and rectum
  • Surgery to the gallbladder and biliary duct and to the adrenal glands
  • Surgery for inguinal and incisional hernias
  • Surgery for appendicitis.
Endocrine bowel surgery (glandular surgery)
  • Surgery to the thyroid glands, parathyroid glands and adrenal glands.
Proctology (surgery to the anus)
  • Haemorrhoids
  • Fistulas (abnormal connecting channels)
  • Fissures (painful tears)
  • Abscesses
  • Incontinence
  • Bowel prolapse
Hernia surgery
  • Minimally invasive or open surgery for diaphragmatic, inguinal and incisional hernias, corrective surgery
Second opinion
  • Thanks to a close network of experienced specialists, all patients can be given a second opinion in accordance with the most up-to-date insights.
Emergency ward
  • Our emergency ward, with its state-of-the-art equipment, is available 24 hours per day, 7 days per week.
Leading Medicine Guide

Selected expert in the specialist field Visceral Surgery

Other services

  • Acute abdomen
  • Anal fissure
  • Appendicitis, inflammation of the appendix
  • Peritonitis (inflammation of the peritoneum)
  • Cancer of the pancreas
  • Colonic diverticular disease, diverticulosis, diverticulitis
  • Bowel cancer (colon cancer and rectal cancer), colorectal carcinoma
  • Intestinal obstruction, ileus, intestinal invagination in infants
  • Ectopic pregnancy
  • Inflammation of the gallbladder, cholecystitis
  • Cancer of the gallbladder
  • Gallstones, cholelithiasis
  • Gastrointestinal stromal tumour, GIST
  • Haemorrhoids
  • Liver cancer
  • Inguinal hernia, hernia inguinalis
  • Gastric cancer
  • Thyroid Cancer
  • Oesophageal cancer, oesophageal carcinoma


Airports near

  • Zurich airport45 km

Railway stations in the vicinity

  • Cham railway station650 m