Everything John T said, so calm down. Plus:
"Not all hypoechoic prostatic nodules are malignant. The differential diagnosis for a hypoechoic prostatic abnormality includes prostatitis, atrophy and g[r]anulomatous disease, making standard grayscale TRUS [transrectal ultrasound] insensitive and nonspecific for cancer detection." A. Abdellaoui et al., Imaging in Prostate Cancer, Future Oncol. (2011).
/www.medscape.com/viewarticle/742986_2The article also says that the chance a hypoechoic lesion is positive for PCa on biopsy is only 9 percent. The incidence of malignancy rises significantly with positive DRE, high PSA, or if the lesion is in the outer zone of the prostate.
Not sure from your post whether you had TRUS or abdominal ultrasound, or both. TRUS is the standard for ultrasound imaging of the prostate, abdominal for the bladder.