Assessment of in vivo calculation with ultrasonography compared to physical sections in vitro: a stereological study of prostate volumes
- نوع فایل : کتاب
- زبان : انگلیسی
- مؤلف : Niyazi Acer , Mustafa Sofikerim , Tolga Ertekin, Erdog˘an Unur , Mahmut C¸ ay , Figen O¨ ztu¨rk
- چاپ و سال / کشور: 2010
Description
We compared three methods for the determination of prostate volume: prostate volume measured via transrectal ultrasonography (TRUS); the Cavalieri method for measuring physical sections; and volume by displacement. TRUS volumes were calculated by the prolate ellipsoid volume formula. Five patients underwent TRUS examination of the prostate prior to radical prostatectomy; specimens were measured when freshly excised. Mean prostate volume by fluid displacement, before formalin fixation was 52.8 ± 21.5 cm3, and after formalin fixation 50.4 ± 20.9 cm3. Volumes determined by the Cavalieri principle (point-counting and planimetry) were 47.8 ± 19.3 and 49.1 ± 20.5 cm3; volume measured by TRUS was 42.9 ± 21.9 cm3. Thus TRUS underestimated prostate volume by 21.4%, but excellent agreement was found between actual volume and point counting techniques. We believe that the classic ellipsoid formula is inadequate for determining prostate volume.
Anat Sci Int (2011) 86:78–85 Received: 4 March 2010 / Accepted: 30 June 2010 / Published online: 24 August 2010 Japanese Association of Anatomists 2010
