Erlenmeyer flask deformity

Case contributed by Dr Ian Bickle


Regular orthopedic clinic attender. Previous surgery to the knee. Follow up

Patient Data

Age: 30 years
Gender: Female

Several bilateral osteochondromas the femora and fibula.

The tibial and femoral meta-diaphyseal regions are flared with widening distally.


Prior studies

Prior imaging of the pelvis, femur, tibia and fibula and both shoulders.

All show osteochondromas at these various sites.

Case Discussion

The appearances are those of hereditary multiple exostoses.  

Perhaps more interesting are the appearances of the femora and tibia, in particular the former, demonstrating a very nice example of Erlenmeyer flask deformity.

This is one of several potential causes for this meta-diaphyseal deformity.

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Case information

rID: 59343
Published: 5th Apr 2018
Last edited: 14th Aug 2019
Tag: ripas2
Inclusion in quiz mode: Included
Institution: Rotherham Foundation Hospital Trust

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