Chronic subdural haenatoma refers to collection present for a period of
**Core Concept**
Chronic subdural hematoma (CSDH) is a type of intracranial hemorrhage characterized by the accumulation of blood between the dura mater and the arachnoid membrane, occurring over a prolonged period. This condition is often associated with traumatic brain injury, but can also be caused by anticoagulant therapy, hypertension, or cerebral atrophy.
**Why the Correct Answer is Right**
The duration of a subdural hematoma determines its classification. Acute subdural hematomas typically occur within 24 hours of trauma, whereas subdural hematomas that persist for more than 3 weeks are considered chronic. This distinction is crucial for determining the optimal treatment approach, as chronic subdural hematomas often require a more conservative management strategy, such as observation or surgical intervention. The pathophysiology of CSDH involves the gradual accumulation of blood, which can lead to increased intracranial pressure, brain atrophy, and cognitive decline.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because subdural hematomas are typically classified based on their duration, with acute hematomas occurring within 14 days and chronic hematomas persisting for more than 3 weeks.
**Option B:** This option is incorrect because the exact duration of a subdural hematoma is not specified, making it an ambiguous and incorrect choice.
**Option C:** This option is incorrect because the duration of a subdural hematoma is a critical factor in determining its classification, and a period of 2 weeks is not sufficient to classify it as chronic.
**Clinical Pearl / High-Yield Fact**
Chronic subdural hematomas can be challenging to diagnose, as the symptoms may be nonspecific and can mimic other conditions, such as dementia or depression. A high index of suspicion and a thorough clinical evaluation, including imaging studies, are essential for accurate diagnosis and management.
**Correct Answer:** C.