Final answer:
The first diagnostic test to confirm hepatocellular carcinoma would be an Abdominal ultrasound.
Step-by-step explanation:
The first diagnostic test to confirm the disease of hepatocellular carcinoma in a patient reporting severe pain in the upper right part of the abdomen and an enlarged abdomen would be an Abdominal ultrasound (Option A).
An abdominal ultrasound can be used to detect liver abnormalities such as tumors or masses, and it is a non-invasive and widely available imaging test. This test uses sound waves to create images of the liver and other organs in the abdomen, providing detailed information about the size, shape, and texture of the liver.
Although options B, C, and D can also be used in the diagnostic process, an abdominal ultrasound is usually the initial test performed to evaluate liver abnormalities and confirm the suspicion of hepatocellular carcinoma.
This non-invasive test uses sound waves to image the liver and can detect abnormalities such as tumors or cysts. If an abnormality is detected on ultrasound, further diagnostics, such as a CT scan or liver biopsy, could be warranted to confirm the diagnosis and to determine the nature of the enlargement, whether it be due to hepatocellular carcinoma or another condition such as cysts or an inflammatory process. It is important to note that while blood tests, such as liver function tests (LFTs) and blood tumor markers, can provide additional information about liver health, they are typically not diagnostic on their own for hepatocellular carcinoma.