1 year old spayed year old female Staffordshire Terrier, coughing, also has right fore lameness.
Publication Date: 2016-04-17
History
1 year old spayed year old female Staffordshire Terrier, coughing, also has right fore lameness.
3 images
Findings
Orthogonal radiographs of the thorax are available for interpretation. Throughout the pulmonary parenchyma there are numerous well-defined soft tissue nodules of various sizes. These are most conspicuous on the right lateral projection dorsal to the 4th sternebra, and ventral to the 7th thoracic vertebra. The cardiovascular structures are within normal limits for the age, breed and body condition score of the patient. The cranial abdomen, and musculoskeletal system available for interpretation are within normal limits.
Pulmonary changes most consistent with pulmonary metastasis.
Annotated right lateral thorax
On that right lateral view I have encircled a couple of the soft tissue nodules. These and others are visualized also on the others projections.
Radiographs of the right forelimb
Centered at the level of the proximal right radius there is a large aggressive osseous lesion. There is destruction of the radial cortices with presence of spiculated to amorphous periosteal proliferation extending distally forming a Codman's triangle at the level of the radius mostly laterally. There is also overall sclerosis of the proximal right radius. Moderate soft tissue swelling is noted on the cranial aspect of the radius and extending proximally. Overall the right elbow joint does not appear to be involved as the articular surfaces remain crisp. The trabecular marking of the proximal ulna is marked but there is no evidence of lysis or new bone formation.
Monostotic osseous agressive lesion. Primary consideration is given to a a primary bone neoplasm such as osteosarcoma. When taking in consideration the presence of the thoracic soft tissue nodules a fungal process is very unlikely.
Thorax 4 weeks later
Diffusely throughout the lungs there is progression of all the previously described soft tissue nodules. The right forelimb is absent due to previous amputation.
Quizz
- What is the rule of thumb concerning the localization of primary osteosarcoma ?Towards the knee, away from the elbow
Yeah :)Towards the knee, towards the elbow
No :)Away from the knee, away from the elbow
No :)Away from the knee, towards the elbow
No :)
Pathology Report
There are multiple well defined pale nodules of various sizes throughout the lungs. Similar nodules are noted on the thoracic wall. The forelimb lesion was diagnosed as a chondroblastic osteosarcoma.
