A 58-year-old man with known cirrhosis due to chronic hepatitis B presents with a 2.5 cm nodule in the right lobe of the liver detected on surveillance imaging. A reticulin stain is performed on a biopsy specimen. The structure marked **B** in the diagram (Loss of Reticulin Framework) is noted to be absent in the nodule, while the surrounding cirrhotic liver retains its reticulin framework. Which of the following best explains the diagnostic significance of this finding?