Surgery As a specialist in abdominal surgery, I specialise in minimally invasive surgical treatment of the abdominal organs, including the entire digestive tract with the oesophagus, stomach, small and large intestine, rectum and appendix, liver, pancreas and spleen as well as the thyroid and parathyroid glands at the Surgery Clinic in Zurich. We offer a wide range of services in both outpatient and inpatient settings and customise our surgical services to meet the individual needs of our patients. A wide range of treatment methods and services are offered at the Hirslanden Group's surgical clinics in Cham and Zurich. Non-invasive aesthetic treatments At Dr. Owiera's clinic, we offer various aesthetic treatment options to enhance your body image and shape. Reshape your body by burning fat and building muscle; simply get rid of cellulite and tighten your sagging skin in a minimally invasive way; tighten your skin and reduce unwanted fat to achieve the body image you have always desired!