Endorectal MRI for prediction of tumor site, tumor size, and local extension of prostate cancer

Jun Nakashima, Akihiro Tanimoto, Yutaka Imai, Makio Mukai, Yutaka Horiguchi, Ken Nakagawa, Mototsugu Oya, Takashi Ohigashi, Ken Marumo, Masaru Murai

Research output: Contribution to journalArticle

138 Citations (Scopus)

Abstract

Objectives To assess the value of endorectal magnetic resonance imaging (MRI) for detecting the tumor site, tumor size, and disease extent in patients with localized prostate cancer. Methods The MRI findings were compared with the histopathologic findings of radical prostatectomy specimens in 95 patients. Results The histologic examination revealed 186 cancer foci. Endorectal MRI detected 109 cancer foci. The accuracy, sensitivity, and positive predictive value of endorectal MRI for detecting tumor foci greater than 1.0 cm in diameter was 79.8%, 85.3%, and 92.6%, respectively; the corresponding value for detecting tumor foci smaller than 1.0 cm was 24.2%, 26.2%, and 75.9%, respectively. The maximal tumor diameter on endorectal MRI correlated with that shown by histologic examination for tumors larger than 1.0 cm in diameter. However, it did not correlate significantly with the histologic diameter of tumors smaller than 1.0 cm. The accuracy, sensitivity, specificity, positive predictive value, and negative predictive value of endorectal MRI was 74.7%, 57.1%, 82.1%, 57.1%, and 82.1%, respectively, for the detection of extracapsular extension and was 75.8%, 62.1%, 81.8%, 60.0%, and 83.1%, respectively, for local staging. Conclusions The results of the present study suggest that endorectal MRI is useful for predicting local extension, as well as tumor site and tumor size, of cancer foci greater than 1.0 cm in diameter.

Original languageEnglish
Pages (from-to)101-105
Number of pages5
JournalUrology
Volume64
Issue number1
DOIs
Publication statusPublished - 2004 Jul 1
Externally publishedYes

ASJC Scopus subject areas

  • Urology

Fingerprint Dive into the research topics of 'Endorectal MRI for prediction of tumor site, tumor size, and local extension of prostate cancer'. Together they form a unique fingerprint.

  • Cite this

    Nakashima, J., Tanimoto, A., Imai, Y., Mukai, M., Horiguchi, Y., Nakagawa, K., Oya, M., Ohigashi, T., Marumo, K., & Murai, M. (2004). Endorectal MRI for prediction of tumor site, tumor size, and local extension of prostate cancer. Urology, 64(1), 101-105. https://doi.org/10.1016/j.urology.2004.02.036