At the Priora International Medical Center, Urology is a combination of top expertise, state-of-the-art technology and individualized care. Our department covers the entire spectrum of urological conditions – from preventive examinations and minimally invasive procedures to urological oncology and robotic surgery. Under the leadership of M.Sc. sc. Tomislav Kalem, MD, an internationally trained and proven expert, developed a department where precise diagnostics, safe procedures and quick recovery are the standard of everyday practice.
Mr. sc. Tomislav Kalem – Head of the Department of Urology, Urological Oncology and Robotic Surgery
Mr. sc. Tomislav Kalem, MD, is a Croatian-German urologist with an impressive international career. He graduated from the Faculty of Medicine, University of Zagreb, completed his medical studies in Osijek (1987), and obtained his master’s degree in 1994 in Zagreb. He began his specialization in urology in 1991 in Osijek, and completed it in 1998 in Frankfurt.
During his training, he worked and interned in Bern, Berlin, Karlsruhe and Fulda, where, after his specialist exam, he headed the Department of Urology and Pediatric Urology at the Clinic and then served as Deputy Director (until 2005). From 2005 until the end of 2023, he ran a private practice with 22 beds and a private department at the Lauterbach Hospital (Germany).
Urologist Tomislav Kalem participated in the conference “Croatian Immigration and Economic Development: Specificities and Opportunities”, organized by the Ministry of Demography and Immigration, and held on Tuesday at the Economic Center of Osijek-Baranja County in Osijek.

Kalem, who himself returned to Croatia precisely because of Priora, after three decades of training, working and living in Germany, spoke on the panel “Return and immigration to Slavonia, Baranja and Srijem – development investments and potentials”. You can read more here.
At the end of 2023, he was appointed Director of the Priora International Medical Center and Head of the Department of Urology, Urological Oncology and Robotic Surgery. Historic breakthrough: On June 3, 2024, Dr. Kalem performed the first robot-assisted radical prostatectomy in the Republic of Croatia using the Da Vinci system, thus opening a new chapter in modern urology in the region at the Priora International Medical Center.
Thanks to the introduction of Da Vinci Xi, Mona Lisa Dx Biobot, Histolog, HoLEP and PDD technologies, the most modern urology department in the region was created, with an emphasis on precision, safety and functional recovery.
Assistant Professor, Dr. Sc. Ivan Radoja – urology specialist and expert in neurourology and urodynamics
Doc. prim. dr. sc. Ivan Radoja is a specialist in urology and a subspecialist in neurourology and urodynamics, with clinical and academic experience from KBC Osijek and abroad. He holds the international certificate “Certificate in Urodynamics” (Bristol Urological Institute, UK), with advanced training in urodynamics in the United Kingdom and the Czech Republic. He is an active assistant professor and research associate in biomedicine; in 2019 he defended his doctorate on the impact of urinary incontinence on the quality of life of women.

At IMC Priora, Dr. Radoja specializes in the diagnosis and treatment of functional urinary tract disorders: urinary incontinence, bladder emptying disorders, neurogenic bladder, chronic retention, overactive bladder, and LUTS in men and women.
Thanks to his expertise in urodynamic measurements and neurourology, he provides patients with accurate problem stratification and individualized treatment plans (conservative, minimally invasive, and surgical options), in close collaboration with the Department’s oncology and functional urology departments.
Why is urology at IMC Priora special?

- New generation technology. The integration of Da Vinci Xi robotic surgery enables millimeter precision, smaller incisions, fewer complications and faster recovery.
- A revolution in prostate diagnostics. Mona Lisa Dx enables fusion biopsy (MRI/US), detects even the smallest lesions and shortens the procedure, with fewer unnecessary samples.
- Intraoperative safety. The histologist enables ultra-fast pathohistological confirmation of whether the tumor has been completely removed (in minutes), which increases the radicality and safety of the procedure.
- Experience and mentorship. The first surgeries were conducted under the mentorship of Dr. Georg Schön, one of the European leaders with thousands of robotic surgeries.
Proven practice and patient trust. Patients come from all over Croatia, Europe, and even the Middle East and Brazil – because of the results, approach, and technology.
Prevention and early screening (PSA, ultrasound, MRI, fusion biopsy)
Advanced diagnostics and treatment. Early detection of prostate cancer has been proven to increase the chances of cure. The program includes:
- PSA test and urological examination,
- targeted radiological treatment (ultrasound, MRI),
- Prostate fusion biopsy (Mona Lisa Dx) – a more precise, faster and invasive approach.
Da Vinci Xi robotic surgery – the gold standard for the prostate
Radical prostatectomy – Da Vinci is a minimally invasive procedure that removes the prostate (with seminal vesicles and, if necessary, lymph nodes). Advantages:
- less bleeding, less pain, smaller incisions,
- shorter hospital stay (often discharged on the 4th–6th day)
- preservation of continence and potency in a higher percentage (thanks to 3D/HD optics and precision of instruments)

HoLEP, PDD and functional urology
- HoLEP (holmium laser) for prostatic hyperplasia – tissue ablation with excellent functional outcomes.
- PDD (photodynamic diagnostics) increases the visibility of tumor changes in the bladder.
- Functional urology (incontinence, neuromodulator) – individualized plans aimed at restoring quality of life.
Services and procedures at IMC Priora – from consultation to rehabilitation
Diagnostic and outpatient services
- specialist urological examination and second opinion
- PSA screening and laboratory processing
- ultrasound, uroflowmetry, cystoscopy
- prostate fusion biopsy – Mona Lisa Dx
prostate fusion biopsy – Mona Lisa Dx
- Radical prostatectomy – Da Vinci
- Nephrectomy / partial nephrectomy – Da Vinci
- HoLEP
- Circumcision, meatoplasty
- Varicocele, hydrocele, hernia
- Vasectomy
- Treatment of warts and condylomas
- Neuromodulator
- TURP / TURM
- Circumcision, meatoplasty, vasectomy
Urology – what does the patient experience look like?
From the first call and consultation, through detailed treatment, a clear treatment plan and surgery (if necessary), to check-ups and rehabilitation – the IMC Priora Urology team guides the patient step by step.
Our approach means: professional communication without jargon, realistic expectations, support for the patient and family, and the availability of the doctor for questions and doubts.
Request an appointment with Tomislav Kalem, M.D. and find out your personalized diagnostic and treatment plan.

Patient stories and results – the power of trust
In our blog and news, you can read real experiences of patients who have undergone Mona Lisa diagnostics and Da Vinci surgery. Their testimonies speak best of a quick recovery, minimal pain, and return to daily activities.
Read experiences and reports → click to open the article
- “Da Vinci is a miracle – it’s like I never had prostate cancer” → Learn more
- “Da Vinci – the most modern urology department in the region” → Find out more
- “Radical prostatectomy – Da Vinci” (about the procedure) → Learn more
- “Da Vinci Xi and Mona Lisa Dx – a new era in prostate cancer treatment” → Learn more
Ordering and contact International Medical Center Priora
We are at your disposal to review the price list and organize your arrival. Our team will help with appointments, preoperative preparation, accommodation and postoperative care.
Contact us to book an appointment via our website or by calling our phone number +385 227 400.