Multiple hereditary exostoses

Case contributed by Dr Tom Elswood


Patient with a known condition presents on two separate occasions with knee and ankle pain

Patient Data

Age: 20 years
Gender: Male

Frontal and lateral views of the right knee and right ankle, from two separate presentations.

Multiple metaphyseal and peripheral diaphyseal osteochondromata in the femur, tibia and fibula. No fracture. No features of malignant transformation.

The femur and tibia also demonstrate Erlenmeyer flask deformities.

Distal tibia also demonstrates an incidental, benign enostosis.

Case Discussion

This patient presented with knee pain and, to exclude potential chrondrosarcomatous transformation of an osteochondroma cartilage cap, an MRI of the knee was advised.

Multiple hereditary exostoses (MHE) (a.k.a. diaphyseal aclasia) is a recognized cause of Erlenmeyer flask deformity.

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Case information

rID: 87284
Published: 26th Feb 2021
Last edited: 26th Feb 2021
Inclusion in quiz mode: Included
Institution: NHS Greater Glasgow and Clyde

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