Fact-sheet: Subperiosteal hematoma
Updated on 08/13/2020 at 3:50 PM
Note : 0/10
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Definition
Post-traumatic lesion, generally following blunt trauma.
May go unnoticed in the acute phase.
Subperiosteal hematomas are also referred to as "turret exostoses"
Clinical features
Often asymptomatic.
Pain
Ultrasound
Rounded anechoic area in contact with the cortex
CT
Hypodensity with ossified margins in a biconvex lens shape in its chronic form
MRI
T1: intermediate signal
T2: hyperintense
Nuclear medicine
Peripheral uptake with central lucency in a "donut" pattern.
Scintigraphy can also be useful to assess ossification maturity
Differential diagnosis
Aneurysmal bone cyst,
simple bone cyst