Aneurysmal bone cyst with non-ossifying fibroma

Case contributed by Dr Roberto Schubert

Presentation

Painful right upper arm. Previous radiographic diagnosis of NOF.

Patient Data

Age: 19
Gender: Male

Large tubular cystic lesion in the proximal shaft and metaphysis of the right humerus. Predominant characteristics of a cyst with T2 hyperintense / T1 hypointense signal and absent enancement except for the distal end of the lesion, where there is solid hypovascular tissue, partly surrounded by rim sclerosis (adjacent to the lateral endosteal surface).

Case Discussion

In about one third of aneurysmal bone cyst, preexisting lesions can be identified, most commonly giant cell tumours. Non-ossifying fibroma belongs to the less commonly encountered, albeit well-documented precursors of ABCs1.

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Case Information

rID: 28020
Case created: 5th Mar 2014
Last edited: 9th Oct 2015
Inclusion in quiz mode: Included

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