**Question:** Apple-jelly nodules is/are seen in -

*Core Concept*: Apple-jelly nodules are a characteristic finding in specific liver diseases. They are characterized by the appearance of the liver parenchyma, which appears as a transparent, jelly-like substance when examined using ultrasound or computed tomography (CT) imaging.

**Why the Correct Answer is Right:** Apple-jelly nodules are a manifestation of severe liver fibrosis, particularly in cases of chronic viral hepatitis, autoimmune hepatitis, primary biliary cholangitis, or Wilson's disease. The jelly-like appearance is due to the replacement of normal liver cells (hepatocytes) with scar tissue (fibrosis), which reduces the echoic properties of the liver and makes it appear as apple-jelly on imaging modalities.

**Why Each Wrong Option is Incorrect:**

A. **Nodular regenerative hyperplasia (NRH)**: This is a condition characterized by nodular regeneration of hepatocytes due to liver injury or disease. Although NRH can lead to liver fibrosis, apple-jelly nodules are not a typical feature of this condition.

B. **Hepatocellular carcinoma (HCC) or liver cirrhosis**: Both HCC and liver cirrhosis can lead to liver fibrosis, but apple-jelly nodules are not a specific feature of these conditions. The correct answer, liver fibrosis, is more general and encompasses these conditions.

C. **Primary sclerosing cholangitis**: This is a condition affecting the bile ducts, not liver fibrosis. Apple-jelly nodules are not seen in this condition.

D. **Intrahepatic cholestasis**: This is a condition characterized by the obstruction of intrahepatic bile ducts, which can lead to liver fibrosis. However, apple-jelly nodules are not a typical feature of intrahepatic cholestasis.

E. **Liver cirrhosis**: Liver cirrhosis is a result of liver fibrosis and can lead to apple-jelly nodules. However, this option is not specific enough when compared to the answer choice "liver fibrosis."

**Clinical Pearl:** Liver fibrosis is the common denominator among the correct options. It is the accumulation of excessive fibrous tissue in the liver, leading to replacement of normal liver cells with scar tissue. Apple-jelly nodules are a characteristic imaging feature of severe liver fibrosis, where the liver parenchyma is replaced by fibrous tissue. This is a critical finding in diagnosing and monitoring the progression of liver diseases such as chronic viral hepatitis, autoimmune hepatitis, and Wilson's disease. Understanding the different causes and imaging features of liver fibrosis is essential for a practicing physician or a medical student preparing for exams like NEET PG.