Subdural Hygroma

Subdural hygroma is a medical condition where cerebrospinal fluid (CSF) accumulates in the subdural space of the brain. This thin space is located between the brain’s surface and its protective outer membrane. In this article, we will explore the causes, symptoms, and the crucial role of imaging in diagnosing and treating subdural hygroma.

What is Subdural Hygroma?

Subdural hygroma is the accumulation of cerebrospinal fluid (CSF) in the subdural space, which is a thin layer between the brain’s surface and its outermost protective membrane. This condition typically occurs as a result of head trauma, but it can also develop without any known injury.

Causes of Subdural Hygroma

  1. Head Trauma: The most common cause of subdural hygroma is head trauma, such as a fall or car accident. The force from the impact can result in an accumulation of CSF in the subdural space.
  2. Spontaneous Development: In some cases, subdural hygromas can develop without any apparent head injury. The exact cause for this is not always clear.

Symptoms of Subdural Hygroma

The symptoms of subdural hygroma can vary depending on the size and location of the fluid collection. Common symptoms include:

  1. Asymptomatic: Many patients have no symptoms
  2. Headache: Persistent, severe headaches are a common symptom, as the pressure on the brain can lead to discomfort.
  3. Nausea and Vomiting: Increased intracranial pressure may cause nausea and vomiting.
  4. Confusion: Subdural hygroma can affect cognitive function, leading to confusion and difficulty concentrating.
  5. Balance Issues: Some individuals may experience problems with balance and coordination.
  6. Seizures: In more severe cases, seizures can occur.

The Role of Imaging in Diagnosis

Imaging plays a crucial role in diagnosing subdural hygroma and assessing its severity. Two primary imaging techniques are commonly used:

  1. CT Scan (Computed Tomography): A CT scan is often the initial imaging method used to evaluate subdural hygroma. It provides detailed images of the brain and can reveal the presence of subdural fluid collections. In the images, subdural hygromas typically appear as low-density areas.
  2. MRI (Magnetic Resonance Imaging): MRI provides even more detailed images of the brain and is often used when additional information is needed. It can show the extent of the hygroma and help in differentiating it from other conditions.

Treatment Options

The treatment of subdural hygroma depends on its size, symptoms, and the underlying cause. Some common treatment options include:

  1. Observation: Small, asymptomatic hygromas may not require immediate treatment and can be monitored over time.
  2. Drainage: In cases where the hygroma is causing significant symptoms, surgical drainage may be necessary to remove the accumulated fluid and relieve pressure on the brain.
  3. Addressing Underlying Causes: If the hygroma is related to an underlying condition, such as bleeding disorders, addressing that condition is essential.
  4. Medication: In some cases, medications may be prescribed to manage symptoms, such as pain


Subdural hygroma is a medical condition characterized by the accumulation of cerebrospinal fluid in the subdural space of the brain. It can result from head trauma or develop spontaneously. Imaging techniques, such as CT scans and MRIs, are vital for diagnosing and assessing the condition. Early diagnosis and appropriate treatment are key to managing subdural hygroma and preventing complications. 

Disclaimer: The content of this website is provided for general informational purposes only and is not intended as, nor should it be considered a substitute for, professional medical advice. Do not use the information on this website for diagnosing or treating any medical or health condition. If you have or suspect you have a medical problem, promptly contact your professional healthcare provider.

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