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8 year old St. Bernard with non weight-bearing lameness

May 18, 2015 By Allison Zwingenberger

Today’s case is an 8 year old St. Bernard with non weight-bearing lameness and firm swelling on the distal tibia of the right hind limb.

2D Series 1
2D Series 2

Show findings...

Findings

There is a large, expansile, destructive osseous lesion of the distal right tibia with cortical destruction, most severe at the caudal and medial margins. There is also mild, irregular periosteal proliferation and soft-tissue thickening at the site.

Show differential diagnosis…

Differential Diagnosis

Primary bone tumor

  • osteosarcoma
  • chondrosarcoma
  • fibrosarcoma
  • hemangiosarcoma
  • liposarcoma

Show diagnosis…

Diagnosis

Osteosarcoma

Show discussion…

Discussion

This lesion is characteristic of a primary bone tumor. The location and expansile, destructive pattern are features to look for. A fungal osteomyelitis would tend to have more productive bone and is often multifocal. Osteosarcoma is most likely in this case.

Case originally posted on August 13, 2007

Filed Under: Canine, Case of the Day, Musculoskeletal, Radiographs

Comments

  1. vickie says

    July 1, 2015 at 4:07 am

    I thought there might have been some lysis in the femoral metaphysis as well?

    • Allison Zwingenberger says

      July 1, 2015 at 8:41 am

      The whole limb is affected by disuse osteopenia, making the cortices thin and causing the relative lucency of the metaphysis on the lateral projection.

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