The following image identifies an adnexal mass that was found in a reproductive-age female who presented with a history of dysmenorrhea and infertility. Which one of the following conditions best correlates as a differential with the information provided?  

A small sonolucent mass is seen within the umbilical cord adjacent to the vessels. Which of the following structures correlates with this sonographic description?

A 60 year-old male presents with right upper quadrant pain, jaundice, and elevated liver enzymes after returning home from missionary work in Africa. Sonography revealed an enlarged liver with fibrosis along the intrahepatic portal veins. Which one of the following conditions is most likely based on the information provided?

When imaging the female pelvis sonographically, which one of the following is considered a disadvantage of an overdistended bladder?

Which of the following veins do NOT have valves?

An item that wafts through the air is an item that 

The lesser saphenous vein originates:

A 40-year-old female presents with back pain, hematuria and hypertension. The following image of the right kidney was obtained during an abdominal sonogram. Which one of the following pathologies is most likely?

Which one of the following structures is the functional unit of the kidney?

Which of the following structures has a superior relationship to the prostate?