[Ultrasonographic concept of the central prostate. Value of the endorectal approach].

In view of the difficulties involved in tissue characterisation of prostatic lesions by suprapubic and transrectal ultrasonography, the authors propose the concept of the central prostate in order to improve the possibility of histological diagnosis based on a topographical approach to ultrasound modifications. When the lesions are selectively situated in the central prostate, with clear distinction between the central prostate and the peripheral prostate, there is a low probability of a neoplastic lesion. However, the histological diagnosis must be extremely cautious and when a suspicious lesion is detected on ultrasonography, ultrasound guided aspiration biopsy may be required.