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16 Cards in this Set
- Front
- Back
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What was the patient in this case & clinical signs?
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6 month old FS bassett hound, history or oral bleeding and swelling 104-107
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What was the original presumed diagnosis?
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Due to the discolored persistent 504. A non-vital 504 with associated abscessation was presumed.
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Did the original biopsy give a definitive diagnosis?
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No, the first biopsy consisted of extracted 504 with some alveolar bone attached. This biopsy came back as reactive bone and "no clear evidence of neoplasia"
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What was interesting at the recheck in thinking this may be more than reactive bone?
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The gingival inflammation and swelling was still present. However the extraction site had healed and bleeding had stopped.
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Definitive biopsy was performed upon necropsy when 18 days postoperatively patient was bleeding again.
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Biopsy revealed maxillary hemangioma
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Are hemangiomas common in dogs and cats? What is the sex predilection?
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Hemangiomas are a relatively common soft tissue tumor in dogs and cats--however intraosseous hemangiomas appear to be rare. There is a female sex predilection (2:1 to 3:1) of hemangiomas
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A hemangioma is what cell type in origin?
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Mesenchymal cells (proliferation of mesenchymal rests into blood vessels)
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Why might a biopsy of a suspected hemangioma not be a good idea?
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Exsanguination could occur
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What are some other diagnostics that may support a diagnostic of hemangioma?
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1. Radiographs; 2. CT; 3. Angiography
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What are the radiographic signs seen with hemangioma?
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Having an alveolate, "soap bubble", "honeycomb", or "sunburst" osteolytic pattern, although the first recognizable radiographic changes may also be an ill-defined, osteolytic pattern. Bone erosion and/or resorption of incorporated dental structures may be present, however occasionally images are non-diagnostic
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What is embolization?
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results in reduced blood flow and subsequent ischemic injury to vessels, however the development of collateral vessels makes reduction of tumor volume by embolization only temporary
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Why would embolization be performed?
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To help control hemorrhage in surgical excision of a hemangioma
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What are some complications of emoblization?
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1. Inadvertent embolization of cerebral or pulmonary vessels; 2. Hemiplegia; 3. Blindness; 4. Facial paralysis
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How could one distinguish between a hemangioma and a vascular malformation?
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Immunohistochemistry
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Why would you want to distinguish b/w hemangioma and a vascular malformation?
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The distinction is important since hemangiomas are usually followed by a potentially curative involution phase 80-90% of the time, whereas vascular malformations do not undergo involution and intervention is warranted
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Is there a sex predilection for a vascular malformation?
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No
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