Welcome to Classifications and Online Calculators in Radiology

This site was build along with the Atlas of Radiology Images to support your knowledge in radiology.

You will find here:

that are used in radiology and related fields with free access.


  • Some pages are accompanied by illustrations
  • All pages contain tags for easy navigation

The concept

The concept of this website is based on a previous site that was founded in 2008 and is still up and running. The website is composed as a book, where all sources are properly referenced, according to a good practice in scientific publications.

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    Prostatic cancer - types of invasion into seminal vesicles

    Researches at the Baylor College of Medicine identified and defined three types of invasion of prostatic cancer into seminal vesicles.

    Type Description
    Type I direct spread of prostate cancer along the ejaculatory duct complex into the seminal vesicles
    Type II invasion through the prostatic capsule into the seminal vesicles
    • Type IIA: direct spread of prostate cancer through the base of the prostate
    • Type IIB: retrograde growth of prostate cancer from the periprostatic nerve involvement
    Type III prostate cancer metastases in the seminal vesicles with no direct connection to the primary focus


    1. Wheeler TM. Anatomic considerations in carcinoma of the prostate. Urol Clin North Am. 1989 Nov;16(4):623–34.
    2. Ohori M, Scardino PT, Lapin SL, Seale-Hawkins C, Link J, Wheeler TM. The mechanisms and prognostic significance of seminal vesicle involvement by prostate cancer. Am J Surg Pathol. 1993 Dec;17(12):1252–61.
    3. Potter SR, Epstein JI, Partin AW. Seminal Vesicle Invasion by Prostate Cancer: Prognostic Significance and Therapeutic Implications. Rev Urol. 2000;2(3):190–5

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