[Cytomegalovirus cystitis and AIDS. The value of deep bladder biopsy. Apropos of a case].

In the light of a case of CMV cystitis in an HIV 1-sero-positive patient suffering from disabling bladder pain, refractory to the usual treatments, the authors describe the mechanism of infection, the diagnostic approach, and especially the value of deep bladder biopsies by resection, as the endoscopic appearance is not pathognomonic and CMV was only detected in the deep muscle layer.