The investigation and management of interstitial cystitis.

Interstitial cystitis (IC) is a chronic inflammatory disorder of the bladder that is notoriously difficult to manage and can result in considerable morbidity. It very likely overlaps with painful bladder syndrome, but they are different conditions. The aetiology remains obscure, and the definition and diagnostic criteria are debated. The diagnosis of IC is one of exclusion, frequently based on symptoms and cystoscopy findings. Typical symptoms include frequency, urgency, dysuria and lower abdominal, bladder, vaginal, urethral or perineal pain, in the absence of bacterial cystitis. Voiding often relieves the suprapubic discomfort, and drinking alcohol- and caffeine-containing drinks frequently exacerbates it. Many treatments have been tried, with little sustained success. Proposed systemic treatments include anti-histamines, heparin, amitriptyline and pentosan polysulfate (a synthetic analogue of glycosaminoglycan which augments the mucous protective layer of the bladder). In many patients symptoms are improved following cysto-distension but the benefits are short-lived. Instillations of dimethyl sulfoxide, hyaluronic acid or chondroitin also show promise. Where treatments have failed and symptom severity is such that the patient's quality of life is poor, a urological opinion should be sought and reconstructive surgery considered. Available options include partial cystectomy, augmentation cystoplasty, and urinary diversion with or without cystectomy.