True about chronic subdural hematoma is
**Core Concept**
Chronic subdural hematoma is a type of intracranial hemorrhage characterized by the accumulation of blood between the dura mater and the arachnoid membrane, typically occurring over a period of weeks or months. This condition often results from a head injury, but it can also be caused by conditions such as cerebral atrophy or anticoagulant therapy.
**Why the Correct Answer is Right**
Chronic subdural hematoma is often associated with a gradual increase in intracranial pressure, leading to symptoms such as headache, confusion, and cognitive decline. The blood collection can also cause compression of the underlying brain tissue, resulting in atrophy and potentially leading to hydrocephalus. The chronic nature of this condition makes it distinct from acute subdural hematomas, which typically present with more sudden and severe symptoms.
**Why Each Wrong Option is Incorrect**
* **Option A:** This option may be incorrect as chronic subdural hematomas are typically not associated with a sudden increase in intracranial pressure, unlike acute subdural hematomas.
* **Option B:** This option may be incorrect as chronic subdural hematomas are not typically caused by a specific vascular malformation, unlike some other types of intracranial hemorrhages.
* **Option D:** This option may be incorrect as chronic subdural hematomas are not typically associated with a specific type of anticoagulant therapy, although anticoagulants can increase the risk of this condition.
**Clinical Pearl / High-Yield Fact**
A key characteristic of chronic subdural hematomas is their tendency to present with non-specific symptoms, making diagnosis challenging. A high index of suspicion and imaging studies, such as CT or MRI, are essential for accurate diagnosis.
**Correct Answer: C.**