40 yr old woman presents to your clinic with complaints of headache and dizziness. She has an infection of a cranial dural sinus; one that lies in margin of the tentorium cerebelli and runs from the posterior end of cavernous sinus to transverse sinus is infected. Which of the following sinuses is affected by inflammation?

**Core Concept**
The question requires knowledge of the **dural sinuses**, which are venous channels located between the layers of the dura mater in the brain. These sinuses are crucial for the drainage of venous blood from the brain. The **tentorium cerebelli** is a fold of the dura mater that forms a partition between the cerebrum and cerebellum.

**Why the Correct Answer is Right**
The description given points towards the **superior petrosal sinus**, which is located at the margin of the tentorium cerebelli and connects the cavernous sinus with the transverse sinus. This sinus plays a key role in the venous drainage of the brain and is a common site for thrombosis or infection.

**Why Each Wrong Option is Incorrect**
**Option A:** This is not the correct answer because the described location does not match the typical anatomy of this sinus.
**Option B:** Similarly, this option does not fit the given anatomical description.
**Option D:** This option is also incorrect as it does not correspond to the sinus connecting the cavernous and transverse sinuses at the tentorium cerebelli.

**Clinical Pearl / High-Yield Fact**
Infections of the dural sinuses can lead to serious complications, including **cerebral venous sinus thrombosis**. It's crucial to promptly diagnose and treat such infections to prevent long-term neurological damage.

**Correct Answer:** C. Superior Petrosal Sinus.

✓ Correct Answer: A. Superior petrosal sinuses