Posterior fossa (venous) extradural haematoma in a child

Case contributed by Dr Chris O'Donnell


Recent head strike, now drowsy and headache.

Patient Data

Age: 8 years
Gender: Male

Biconvex extra-axial mass of heterogeneous T1 and T2 signal (including T1 hyperintensity and susceptibility artefact on SWI indicative of blood) overlying the left cerebellar hemisphere, entering the supratentorium displacing the dura anteriorly.  No obvious overlying fracture or scalp swelling/haematoma.  Focal mass effect.

Case Discussion

Extradural haematoma is much less commonly seen in the posterior fossa than supratentorium (usually in the middle cranial fossa). The haematoma has the typical lentiform shape (bi-convex) of extradural haemorrhage and strips the dura anteriorly as evidenced by displacement of the transverse sinus anteriorly (arrow).  Origin of the bleeding is presumed to be due to disruption of the sinus, i.e. venous bleeding.

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Case information

rID: 58309
Case created: 11th Feb 2018
Last edited: 20th Mar 2018
Inclusion in quiz mode: Excluded

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