Final answer:
Adenomyomatosis is a benign disease of the gallbladder wall characterized by the growth of excess tissue. It can be asymptomatic or cause abdominal pain and discomfort.
Step-by-step explanation:
Adenomyomatosis is thought to be a **benign** disease of the **gallbladder** wall. It is characterized by the growth of **excess tissue** within the gallbladder, which can lead to the formation of polyps or outpouchings. Adenomyomatosis is often asymptomatic, but in some cases, it can cause abdominal pain and discomfort.