How might the tympanic membrane appear in a patient diagnosed with mucoid otitis media?

In a case of mucoid otitis media, the tympanic membrane, also known as the eardrum, typically appears opaque and may exhibit changes that indicate the presence of fluid or infection behind it. In this condition, the normal translucency of a healthy tympanic membrane is compromised due to the buildup of mucoid fluid in the middle ear, causing it to appear less clear.

The other options describe characteristics that are more indicative of different ear conditions. Red and swollen membranes would suggest acute inflammation or infection, typically seen in acute otitis media. A transparent and moist membrane may align more with a healthy tympanic membrane or certain other conditions, while a pearly white and scabbed membrane could imply chronic issues or tympanic membrane scarring, which is not representative of mucoid otitis media. Thus, the appearance of an opaque tympanic membrane aligns correctly with the diagnosis of mucoid otitis media.