What is the most specific feature of a peritonsillar abscess?

What is the most specific feature of a peritonsillar abscess?

• A. Severe sore throat
• B. Drooling
• C. Difficulty opening mouth
• D. Uvula deviation

Answer: (C)

The key finding that points to a peritonsillar abscess is trismus—the inability or marked difficulty in opening the mouth. The infection in the peritonsillar space irritates the muscles of mastication, especially the pterygoids, causing painful jaw movement. This jaw-spasm tends to be more specific to a deep neck or peritonsillar space infection than just having a severe sore throat, which occurs with many illnesses. Drooling and fever can accompany PTA but are not unique to it, and uvular deviation, while classic when visible, isn’t always present and can be missed early. So the limitation in opening the mouth is the most specific clinical clue among the options.

The key finding that points to a peritonsillar abscess is trismus—the inability or marked difficulty in opening the mouth. The infection in the peritonsillar space irritates the muscles of mastication, especially the pterygoids, causing painful jaw movement. This jaw-spasm tends to be more specific to a deep neck or peritonsillar space infection than just having a severe sore throat, which occurs with many illnesses. Drooling and fever can accompany PTA but are not unique to it, and uvular deviation, while classic when visible, isn’t always present and can be missed early. So the limitation in opening the mouth is the most specific clinical clue among the options.