What is described as "enlarged megaly" in medical terminology?

In medical terminology, "megaly" refers to enlargement, often used in conjunction with an organ to describe its abnormal enlargement. When considering the term "megacolon," it specifically indicates an abnormal enlargement of the colon. This condition can result from various factors, including obstruction or disease, and is characterized by a significant increase in the size of the colon itself, rather than a mere distension from gas or contents.

The other options refer to different anatomical structures or conditions. The hepatic flexure is a bend in the colon, not a condition of enlargement. The gastric air bubble describes air within the stomach, which doesn't relate to enlargement but rather to a normal or abnormal finding in imaging studies. Volvulus refers to a twisting of the intestine, which can cause obstruction but does not define enlargement. Therefore, megacolon is the only term that matches the description of "enlarged megaly."