**Question:** Tumour showing dural enhancement with a tail

**Core Concept:**
The question pertains to the demonstration of a tumor on imaging studies like MRI or CT scan, where the tumor enhances the dura mater (the outermost layer of the skull covering the brain) and has a tail-like extension. This characteristic pattern is often associated with a specific type of tumor.

**Why the Correct Answer is Right:**
The correct answer, **C:** Meningioma, represents a type of tumor originating from the meninges, which are the protective coverings of the brain and spinal cord. Meningiomas typically exhibit dural tail sign due to the tumor's attachment to the arachnoid membrane, which is continuous with the dura mater. The tail-like extension results from the tumor compressing the arachnoid membrane, causing contrast material to spread along the arachnoid surface, mimicking a tail sign.

**Why Each Wrong Option is Incorrect:**
A. **Neurofibroma:** This term refers to a benign nerve sheath tumor that originates from the peripheral nerves but does not typically demonstrate dural enhancement or the tail sign.

B. **Ependymoma:** Ependymomas are brain tumors that arise from the ependymal cells lining the ventricles. Unlike meningiomas, they usually do not exhibit the dural tail sign.

D. **Dural sinus thrombosis:** This is a clinical entity characterized by thrombosis in the dural sinuses, not a tumor. The correct answer is focused on a tumor, not a vascular disorder.

**Clinical Pearl:**
A dural tail sign on imaging studies is a valuable clue for the diagnosis of a meningioma, aiding in distinguishing it from other brain tumors and vascular disorders. Recognizing this feature aids in narrowing down the differential diagnosis and facilitates proper management and treatment planning for the patient.