Subdural hygroma
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Subdural hygromas refers torefer to a cerebrospinal fluid (CSF) accumulation in the sub-duralsubdural space. In many cases it is considered an epiphenomenon of head injury where itwhen it is termedcalled atraumatic subdural hygroma.
Pathology
They generally occur along the supratentorial cerebral convexities and occurrence; occurrence in the posterior fossa is generally rare 4.
Aetiology
- idiopathic: in paediatric patients
- trauma: secondary to tear in the arachnoid mater
- post surgical, e.g. haematoma evacuation, ventricular drainage
Radiographic features
CT/MRI
Crescentic CSF density/signal accumulation of CSF in subdural space whichthat does not extend into the sulci. Vessels may cross thorughthrough the lesion in contrast enhanced studies.
Differential diagnosis
Imaging differential considerations include
- chronic subdural haematoma: MRI may required to differentiate as they can have an identical appearance on CT
- atrophy
/ involutional/involutional change with enlargement of the subarachnoid space
-<p>A <strong>subdural hygroma</strong> refers to a cerebrospinal fluid accumulation in the sub-dural space. In many cases it is considered an epiphenomenon of head injury where it is termed a traumatic subdural hygroma. They generally occur along the supratentorial cerebral convexities and occurrence in the posterior fossa is generally rare <sup>4</sup>.</p><h4>Radiographic features</h4><p>Crescentic CSF density accumulation of CSF in subdural space which does not extend into the sulci. Vessels may cross thorugh the lesion in contrast enhanced studies.</p><h4>Differential diagnosis</h4><p>Imaging differential considerations include</p><ul>-<li>chronic <a href="/articles/subdural-haemorrhage">subdural haematoma</a>- +<p><strong>Subdural hygromas</strong> refer to a cerebrospinal fluid (CSF) accumulation in the <a href="/articles/subdural-space">subdural space</a>. In many cases it is considered an epiphenomenon of head injury when it is called a <strong>traumatic subdural hygroma</strong>. </p><h4>Pathology</h4><p>They generally occur along the supratentorial cerebral convexities; occurrence in the posterior fossa is generally rare <sup>4</sup>.</p><h5>Aetiology</h5><ul>
- +<li>idiopathic: in paediatric patients</li>
- +<li>trauma: secondary to tear in the <a title="Arachnoid mater" href="/articles/arachnoid-mater">arachnoid mater</a>
-<li>atrophy / involutional change with enlargement of the subarachnoid space</li>- +<li>post surgical, e.g. haematoma evacuation, ventricular drainage</li>
- +</ul><h4>Radiographic features</h4><h5>CT/MRI</h5><p>Crescentic CSF density/signal accumulation of CSF in subdural space that does not extend into the sulci. Vessels may cross through the lesion in contrast enhanced studies.</p><h4>Differential diagnosis</h4><p>Imaging differential considerations include</p><ul>
- +<li>chronic <a href="/articles/subdural-haemorrhage">subdural haematoma</a>: MRI may required to differentiate as they can have an identical appearance on CT</li>
- +<li>atrophy/involutional change with enlargement of the subarachnoid space</li>
References changed:
- 6. Hosten N, Liebig T. CT of the Head and Spine. TIS. ISBN:B005R1PB8S. <a href="http://books.google.com/books?vid=ISBNB005R1PB8S">Read it at Google Books</a> - <a href="http://www.amazon.com/gp/product/B005R1PB8S">Find it at Amazon</a><span class="auto"></span>
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