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In this review article, the authors describe all relevant aspects of the new S2k guideline from the German Society of Urology (Deutschen Gesellschaft für Urologie, DGU) for the diagnosis and treatment of IC/PBS (interstitial cystitis/painful bladder syndrome). A list of necessary and optional examinations and the necessity of diagnosis of exclusion are summarized and evaluated. The treatment options listed (ranging from conservative, oral drug, and complementary medicine to interventional surgical procedures) also give the reader a good overview of the contents of the guideline and possible therapeutic approaches. Finally, the recommendations including consensus of the guideline group are also summarized in various information boxes.

Interstitial cystitis is a chronic, heterogeneous syndrome that is characterized by the classic symptoms of bladder pain, nycturia, and pollakiuria. Population studies have shown an increase in prevalence and incidence. Different hypotheses exist about the etiology and pathogenesis. Epithelial dysfunction and neuro-urothelial interaction are the most frequently used causal models. Utilization of the official diagnosis criteria of the NIDDK (National Institute of Diabetes, Digestive and Kidney Disease) should be flexible and individual in order not to overlook early forms of IC. Since there is no pathognomonic marker, diagnosis of IC is a combination of typical patient history and exclusion of differential diagnoses. Cystoscopy and biopsies are not specific; however, they can provide useful information on extent and aid in treatment choice. The effectiveness of conservative therapy has been increased by using electromotive drug administration (EMDA) in instillation therapy.