**Core Concept**
Fibrolamellar hepatocellular carcinoma (FLC) is a rare subtype of liver cancer characterized by its distinct histological features and clinical presentation. It predominantly affects young individuals without underlying liver disease or cirrhosis.

**Why the Correct Answer is Right**
Fibrolamellar carcinoma is a well-circumscribed tumor with a distinct fibrous capsule, which often leads to a more favorable prognosis compared to conventional hepatocellular carcinoma. The tumor is composed of large, polygonal cells with a distinct fibro-vascular core, giving it a characteristic lamellar appearance. The mechanism of FLC is not fully understood, but it is believed to be related to genetic mutations in tumor suppressor genes.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is actually true about fibrolamellar carcinoma, as it is known to have a more favorable prognosis compared to conventional hepatocellular carcinoma.
**Option B:** This option is also true, as fibrolamellar carcinoma often presents in young individuals without underlying liver disease or cirrhosis.
**Option C:** This option is true as well, as fibrolamellar carcinoma is a rare subtype of liver cancer.

**Clinical Pearl / High-Yield Fact**
A key difference between fibrolamellar carcinoma and conventional hepatocellular carcinoma is the absence of cirrhosis in FLC patients. This distinction is crucial for diagnosis and management.

**Correct Answer: A.**