Multiple hereditary exostoses - knee joint

Case contributed by Bahman Rasuli
Diagnosis almost certain

Presentation

Chronic knee pain.

Patient Data

Age: 40 years
Gender: Female
  • multiple bony outgrowths arise from the distal femur and proximal tibia and fibula
  • the cortex of these bony excrescences is continuous with the parent bone
  • these sessile and pedunculated bony excrescences are compatible with osteochondromas
  • mild joint effusion
  • baker cyst along with the posteromedial aspect of knee joint
  • horizontal degenerative tear along with medial meniscus body and posterior horn

Case Discussion

Multiple osteochondromas in a patient are consistent with multiple hereditary exostoses.

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