[Giant bladder calculus in two male farmers in Madagascar]

We report two cases of giant calculus in two male farmers in 1999. They were operated on in the urologic ward by lithocystotomy. Infrared spectrophotometric analysis, carried out in Bordeaux, gave us the main components of the stones. These stones weighed respectively 350 g and 450 g. Research of common aetiology such as vesical neck stricture, prostatic hypertrophy, urethral stricture and urinary bladder diverticula was unsuccessful in case of the first patient; in the opposite, the second one had vesical diverticula discovered operatively. But two phenomena came out from this aetiologic investigation: particular regimen of these farmers (much starchy food) and geographical situation of their health centre (far from their home). We must make general practitioners sensitive to this early signs of the disease in order to provide their patients a precocious and better care.