Which of the following is false regarding frontal sinusitis?
**Core Concept**
Frontal sinusitis is an inflammatory condition affecting the frontal sinus, a paranasal sinus located in the forehead. It is often caused by bacterial infections, particularly those involving *Staphylococcus aureus* and *Haemophilus influenzae*. The frontal sinus is connected to the nasal cavity through the frontal recess, making it susceptible to infections.
**Why the Correct Answer is Right**
The frontal sinus is typically not affected in the early stages of sinusitis, as the infection usually begins in the maxillary or ethmoid sinuses. The frontal sinus is also less likely to be involved in cases of acute bacterial sinusitis, which is a common cause of frontal sinusitis. The frontal sinus is more commonly involved in chronic sinusitis or when there is a blockage in the frontal recess. This is because the frontal sinus is a dependent structure, and gravity affects the flow of mucus and the spread of infection.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is not provided.
**Option B:** This option is not provided.
**Option C:** This option is not provided.
**Option D:** This option is not provided.
**Clinical Pearl / High-Yield Fact**
The most common causes of frontal sinusitis are bacterial infections, particularly those involving *Staphylococcus aureus* and *Haemophilus influenzae*. It is essential to note that the frontal sinus is often not involved in the early stages of sinusitis, and its involvement is more common in chronic sinusitis or when there is a blockage in the frontal recess.
**Correct Answer:** None provided, but based on the question, it seems we are missing options A, B, C, and D.