Difference between revisions of "Amyloid-producing Odontogenic Tumour"
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(New page: {{unfinished}} {{dog}} {{cat}} ==Typical Signalment== *This is a common odontogenic tumour in cats. *More rarely found in dogs. ==Description== ==Diagnosis== ===Clinical Signs=== *hal...) |
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==Description== | ==Description== | ||
| − | + | The lesions appear as masses that are friable and ulcerated. Many amyloid-producing odontogenic tumours are melanotic which makes them difficult to distinguish from the more aggressive malignant melanoma. They can erode but not infiltrate adjacent bone. | |
| + | |||
==Diagnosis== | ==Diagnosis== | ||
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===Diagnostic Imaging=== | ===Diagnostic Imaging=== | ||
| − | Skull radiography may show a soft tissue opacity | + | Skull radiography may show a soft tissue opacity with mineralization within the mass. Periosteal reaction of the adjacent bone may be visualised. If a malignant neoplasm is a dignostic possibility, thoracic radiography should be carried out to evaluate for lung metastases. |
===Biopsy=== | ===Biopsy=== | ||
| + | |||
Required for a definitive diagnosis | Required for a definitive diagnosis | ||
*Incisional Biopsy - best | *Incisional Biopsy - best | ||
*Cytological or grab procedures - difficult to obtain a representative sample | *Cytological or grab procedures - difficult to obtain a representative sample | ||
| + | |||
| + | Histologically, the tumour appears to be well demarcated from the surrounding tissue but is not encapsulated. | ||
==Treatment== | ==Treatment== | ||
| − | * | + | *Surgical excision with narrow margins is normally sufficient. |
| + | *Radiation therapy should be considered in cases of incomplete surgical excision. | ||
| + | |||
==Prognosis== | ==Prognosis== | ||
| − | Good following complete surgical excision. | + | *Good following complete surgical excision. |
| + | *Recurrance following incomplete surgical excision is possible. | ||
==References== | ==References== | ||
Revision as of 10:35, 18 August 2009
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This article is still under construction. |
Typical Signalment
- This is a common odontogenic tumour in cats.
- More rarely found in dogs.
Description
The lesions appear as masses that are friable and ulcerated. Many amyloid-producing odontogenic tumours are melanotic which makes them difficult to distinguish from the more aggressive malignant melanoma. They can erode but not infiltrate adjacent bone.
Diagnosis
Clinical Signs
- halitosis
- oral bleeding
- dental disruption or loss
- facial or mandibular deformity
- excessive salivation
- growth protruding from the mouth
- dysphagia occurs rarely
Diagnostic Imaging
Skull radiography may show a soft tissue opacity with mineralization within the mass. Periosteal reaction of the adjacent bone may be visualised. If a malignant neoplasm is a dignostic possibility, thoracic radiography should be carried out to evaluate for lung metastases.
Biopsy
Required for a definitive diagnosis
- Incisional Biopsy - best
- Cytological or grab procedures - difficult to obtain a representative sample
Histologically, the tumour appears to be well demarcated from the surrounding tissue but is not encapsulated.
Treatment
- Surgical excision with narrow margins is normally sufficient.
- Radiation therapy should be considered in cases of incomplete surgical excision.
Prognosis
- Good following complete surgical excision.
- Recurrance following incomplete surgical excision is possible.
References
- Tutt, C., Deeprose, J. and Crossley, D. (2007) BSAVA Manual of Canine and Feline Dentistry (3rd Edition) BSAVA
- Merck & Co (2008) The Merck Veterinary Manual