High-Frequency Micro-Ultrasound Transrectal Imaging Enhances Staging and Preoperative Planning of Prostate Radiation Induced Rectal Cancer: A Case Report.

High-frequency ultrasound, known as micro-ultrasound (microUS), is a sonographic imaging modality capable of acquiring high-resolution, microscopically detailed images. This technology has been increasingly utilized for prostate cancer biopsy and diagnosis. Its utility outside of prostate cancer is under-described. A 76-year-old male with a past medical history of brachytherapy 25 years prior developed rectal cancer. Before undergoing resection, transrectal microUS was utilized to determine the relation of the rectal mass to the urogenital organs, which better established the planned surgical approach. To our knowledge, using transrectal microUS for evaluation of rectal masses invading the prostate has not yet been reported.