Pathognomonic feature of Maxillary sinusitis is:
**Core Concept**
The pathognomonic feature of maxillary sinusitis refers to a specific clinical sign that is uniquely characteristic of this condition. Maxillary sinusitis is an inflammation of the maxillary sinus, which is one of the paranasal sinuses located in the cheekbones.
**Why the Correct Answer is Right**
The correct answer is **"Halitosis with ipsilateral purulent nasal discharge"**. This is because maxillary sinusitis often presents with a foul-smelling breath (halitosis) due to the accumulation of pus in the sinus, which is then discharged through the nasal passages. The purulent nasal discharge is typically seen on the same side as the affected sinus, making it a key diagnostic feature.
**Why Each Wrong Option is Incorrect**
* **Option A:** This option is incorrect because a sore throat is more commonly associated with pharyngitis or tonsillitis, not maxillary sinusitis.
* **Option B:** This option is incorrect because a cough is a non-specific symptom that can be associated with a wide range of respiratory conditions, including but not limited to, maxillary sinusitis.
* **Option D:** This option is incorrect because a headache can be associated with many conditions, including but not limited to, maxillary sinusitis, and is not a specific or pathognomonic feature.
**Clinical Pearl / High-Yield Fact**
It's essential to note that maxillary sinusitis often presents with a triad of symptoms: facial pain or pressure, nasal congestion, and purulent nasal discharge. However, the presence of halitosis with ipsilateral purulent nasal discharge is a more specific and pathognomonic feature that can help differentiate it from other sinusitis or respiratory conditions.
**Correct Answer:** C. Halitosis with ipsilateral purulent nasal discharge