Increased liver attenuation with intracellular infiltration is seen in –
**Core Concept**
The liver attenuation refers to its density on imaging studies, which can be altered by various pathologies. Intracellular infiltration implies the presence of cells within the liver cells or their cytoplasm, indicating a condition affecting the liver parenchyma.
**Why the Correct Answer is Right**
Increased liver attenuation is often seen in conditions where there is an accumulation of lipids within the hepatocytes, such as in fatty liver disease (steatosis). This occurs due to the abnormal accumulation of triglycerides within the cytoplasm of liver cells, leading to increased density on imaging studies. The most common cause of fatty liver disease is non-alcoholic fatty liver disease (NAFLD), which is associated with obesity, insulin resistance, and metabolic syndrome.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because cirrhosis typically shows decreased liver attenuation due to fibrosis and regenerative nodules, which can lead to a "sunburst" or "feathery" appearance on imaging.
**Option B:** This option is incorrect because liver fibrosis, such as that seen in cirrhosis, typically shows increased liver stiffness rather than attenuation on imaging studies.
**Option C:** This option is incorrect because liver cancer (hepatocellular carcinoma) typically shows hypodense or hypoattenuating lesions on imaging studies, rather than increased liver attenuation.
**Clinical Pearl / High-Yield Fact**
Fatty liver disease is a common condition that can be easily diagnosed on imaging studies, but its presence may not always be associated with symptoms. A critical aspect of diagnosis is recognizing the associated risk factors, such as obesity and metabolic syndrome.
**Correct Answer:** D. Fatty liver disease.