Unicameral bone cyst with fracture - humerus

Case contributed by A.Prof Frank Gaillard


Fall and pain.

Patient Data

Age: 10 years

Well circumscribed, expansile, lucent lesion in the metaphysis and proximal diaphysis. Through the inferior aspect of the lesion a pathological fracture is noted, coursing obliquely downwards from medial to lateral. 

A prominent trabeculation through the upper part of the lesion on x-ray mimics a multiloculated lesion, however unilocularity is confirmed on CT. 

CT obtained sometimes later confirms that the lesion is well circumscribed and unilocular. 

Case Discussion

Features that are consistent with a unicameral bone cyst with a pathological fracture and fallen fragment sign.

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Case information

rID: 7968
Published: 24th Dec 2009
Last edited: 13th Aug 2019
Tag: humerus
Inclusion in quiz mode: Included

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