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Metastatic canine medullary thyroid carcinoma: a case report
Veterinary Pathology
|May 1, 1980
Summary
A highly malignant medullary thyroid carcinoma in a dog presented with metastasis. The tumor showed anaplasia and elevated calcitonin, serotonin, and 5-hydroxytryptophan levels.
Area of Science:
- Veterinary Pathology
- Oncology
- Endocrinology
Background:
- Medullary thyroid carcinoma (MTC) is a neuroendocrine tumor of the thyroid gland.
- Thyroid tumors in dogs are uncommon, with MTC being rare.
- Metastasis is often the first sign of MTC in dogs.
Observation:
- A dog presented with a distant metastasis, which was the initial clinical sign.
- Histological examination revealed a highly malignant tumor with common anaplasia and mitotic figures.
- The tumor cells showed positive staining for calcitonin.
Findings:
- Radioimmunoassay confirmed elevated calcitonin levels, substantiating the MTC diagnosis.
- Neoplastic tissue analysis revealed elevated levels of serotonin and 5-hydroxytryptophan.
- The tumor exhibited aggressive histological features, indicating high malignancy.
Implications:
- This case highlights a highly malignant presentation of canine medullary thyroid carcinoma.
- The biochemical profile, including elevated calcitonin, serotonin, and 5-hydroxytryptophan, provides insights into tumor markers.
- Further research is needed to clarify the relationship between these biochemical alterations and the clinical progression of canine MTC.