**Question:** Lalloo, 60 years of age, a known case of cirrhosis liver, presents with increased levels of Alpha feto protein, hepatomegaly 3 cm below costal margin. USG showed lesions involving the right lobe of the liver. What is the most probable diagnosis:

A. Hepatocellular carcinoma (HCC)
B. Hepatitis
C. Hepatitis B
D. Hepatitis C

**Correct Answer:** A. Hepatocellular carcinoma (HCC)

**Core Concept:**

In this question, we are dealing with a patient with a history of cirrhosis of the liver and clinical findings such as increased levels of Alpha feto protein, hepatomegaly, and lesions involving the right lobe of the liver on ultrasound. Cirrhosis is a condition where the liver is replaced by scar tissue, usually due to chronic inflammation or infection.

**Why the Correct Answer is Right:**

The correct answer is Hepatocellular carcinoma (HCC), also known as primary liver cancer. Hepatocellular carcinoma is a type of cancer that develops from the liver cells (hepatocytes). Since the patient has a history of cirrhosis, which is a known risk factor for the development of HCC, the increased levels of Alpha feto protein, hepatomegaly, and lesions in the right lobe of the liver on ultrasound support the diagnosis of HCC.

**Why Other Options are Incorrect:**

A. Hepatitis: Hepatitis refers to inflammation of the liver, which could lead to cirrhosis but does not directly cause HCC.

B. Hepatitis B: Hepatitis B is a viral infection that can lead to cirrhosis but does not directly cause HCC unless cirrhosis is present.

C. Hepatitis C: Similar to Hepatitis B, Hepatitis C can lead to cirrhosis but does not directly cause HCC unless cirrhosis is present.

**Clinical Pearl:**

The clinical pearl here is the importance of recognizing risk factors and associated conditions in making a diagnosis. In this case, the presence of cirrhosis increases the likelihood of hepatocellular carcinoma, despite the fact that Hepatitis B and C can lead to cirrhosis, they do not directly cause HCC unless cirrhosis is present. Therefore, the focus should be on assessing the patient's risk factors and comorbidities, such as cirrhosis and elevated alpha-fetoprotein levels, to guide the diagnosis of HCC.