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Heterotopic salivary tissue in a weanling colt
L A Dahlgren1, R M DeBowes, L J Gift
1Department of Clinical Sciences, College of Veterinary Medicine, Kansas State University, Manhattan 66506.
Insights
A rare case of ectopic salivary gland tissue was found in a young Quarter Horse. Surgical removal successfully treated the draining wound, resolving the condition.
Area of Science:
- Veterinary Pathology
- Equine Surgery
- Histopathology
Background:
- Congenital abnormalities in horses can present unique diagnostic challenges.
- Ectopic tissue, or tissue found outside its normal location, can lead to various clinical signs.
Observation:
- A 7-month-old Quarter Horse colt presented with a persistent draining wound in the left temporal region since birth.
- Physical examination revealed a tract associated with the wound.
Findings:
- Surgical excision of the temporal tract was performed for diagnostic and therapeutic purposes.
- Histological examination confirmed the presence of heterotopic salivary gland tissue, likely of parotid origin.
- The excised tissue was consistent with a mixed-type salivary gland.
Implications:
- This case highlights the importance of considering ectopic salivary gland tissue in the differential diagnosis of congenital draining wounds in horses.
- Complete surgical excision of the ectopic tissue resulted in complete resolution of the clinical signs.
- This finding contributes to the understanding of congenital anomalies in equine head and neck regions.
Abstract:
Heterotopic salivary tissue was diagnosed in a 7-month-old Quarter Horse colt with a history of a draining wound in the left temporal region from time of birth. Surgical excision of the tract was performed for diagnosis and treatment. Histologically, tissues were compatible with a mixed-type salivary gland, most likely of parotid salivary gland origin. Complete resolution of the drainage was achieved after surgical removal of the ectopic tissue.