As can be expected, the doctors just laughed it off as a coincidence after what had first come to mind of similar incidents of Virgin Mary toast, the Face on Mars, etc. If you look closely at this image, there's little left to the imagination since there's distinct proportional features resembling a man's face including an eye and pupil. From my perspective, it's really a demon manifesting itself as the source of the man's pain but too many people are frightened to even consider this a possibility.
"It was almost like art coming out of this patient's testicles," said Dr. Naji Touma, an assistant professor of urology at Queen's University in Kingston, Ont. "It was an amusing finding." Here's Looking At You: Doctors Find Face In Testicle Ultrasound - MontrealGazette.com
Some really evil looking thing manifesting itself.
The NY Times even did a story on the devil face phenomena.
Many times images appear in clouds as well with distinct human facial features.
What appears to be an ancient roman god manifests in the clouds to a man's utter shock. Our human ancestors may have seen similar things considering these as signs from the heavens.