A patient with sinus infection develops chemosis, B/L proptosis and fever, the diagnosis goes in or of:
**Core Concept**
The underlying principle being tested is the understanding of **orbital complications of sinusitis**, specifically the diagnosis of **cavernous sinus thrombosis** or **orbital cellulitis**. This condition involves the spread of infection from the paranasal sinuses to the orbit, leading to severe consequences.
**Why the Correct Answer is Right**
The correct answer is related to the diagnosis of a severe orbital infection, likely **cavernous sinus thrombosis**, given the symptoms of chemosis, bilateral proptosis, and fever. This condition occurs when the infection spreads to the cavernous sinus, leading to thrombosis and subsequent inflammation.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it does not align with the symptoms described.
**Option B:** This option is also incorrect as it does not match the clinical presentation.
**Option C:** This option is incorrect because it is not a common complication of sinusitis.
**Clinical Pearl / High-Yield Fact**
A key point to remember is that **cavernous sinus thrombosis** is a medical emergency requiring prompt treatment, as it can lead to serious complications, including blindness and death.
**Correct Answer:** D. Cavernous sinus thrombosis.