A patient with sinus infection develops chemosis ,B/L proptosis and fever, the diagnosis goes in favour of-
**Core Concept**
The patient's symptoms suggest an orbital infection, which can be caused by the spread of an infection from the sinuses to the orbit. This condition is known as orbital cellulitis, which can lead to proptosis (bulging of the eye) and chemosis (swelling of the conjunctiva).
**Why the Correct Answer is Right**
The spread of infection from the sinuses to the orbit can occur through the orbital veins or the nasolacrimal duct. The patient's fever and proptosis are indicative of an orbital infection. Chemosis is also a common finding in orbital cellulitis. The correct diagnosis is orbital cellulitis, which requires prompt treatment with antibiotics and potentially surgical drainage.
**Why Each Wrong Option is Incorrect**
* **Option A:** This option is not relevant to the patient's symptoms. The patient does not have symptoms of a lacrimal gland disorder.
* **Option B:** This option is not consistent with the patient's symptoms. The patient does not have symptoms of a thyroid disorder.
* **Option C:** This option is not correct. While the patient has a fever, the primary diagnosis is not a systemic infection such as sepsis.
**Clinical Pearl / High-Yield Fact**
Orbital cellulitis can be a life-threatening condition if not treated promptly. It is essential to consider the patient's symptoms and medical history to make an accurate diagnosis and initiate appropriate treatment.
**Correct Answer: C. Orbital cellulitis**