Laboratory Studies
- Obtain coagulation studies and a platelet count in all patients, particularly those taking anticoagulant medication.
- Obtain other admission laboratory work (including a specimen for blood type and crossmatch) if surgery is a possibility.
Imaging Studies
- CT: Acute CH should be visible as increased density in the posterior fossa.
Large hemorrhage of cerebellar vermis. - Note the location of the hematoma (central versus lobar) and any sign of brainstem compression.
- Note the absolute size of the clot in maximum diameter.
- Other signs of a posterior fossa mass include ablation of the fourth ventricle and/or compression of the ambient and quadrigeminal cisterns.
- Note any obstructive hydrocephalus.
- MRI may be important later in the clinical course to define vascular anatomy, extent of damage, and other pertinent intracranial abnormalities (eg, tumor, arteriovenous malformation).
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