Peer-reviewed veterinary case report
Intraosseous epidermoid cyst in a horse.
- Journal:
- Journal of the American Veterinary Medical Association
- Year:
- 1996
- Authors:
- Camus, A C et al.
- Affiliation:
- Department of Veterinary Pathology · United States
- Species:
- horse
Plain-English summary
A 21-year-old female American Saddle Horse had a noticeable swelling on the lower part of her jaw. After examining her, the vets found that she had a bone cyst, which they surgically opened up. Inside the cyst, they discovered a thick fluid and some skin-like material. The tissue around the cyst showed signs of irritation and was consistent with a type of cyst called an intraosseous epidermoid cyst. After cleaning out the cyst and removing a nearby tooth, they started flushing the area with iodine. Nine months later, the swelling had significantly reduced, and there were no signs of drainage, indicating that the treatment was successful.
Abstract
A 21-year-old female American Saddle Horse with a prominent swelling on the ventral aspect of the right hemimandible and radiographic evidence of a bone cyst was examined. The cyst cavity was surgically explored and was found to contain mucinous fluid and sheets of keratin. Microscopically, the cyst was lined by well-differentiated squamous epithelium characterized by various degrees of hyperkeratosis and parakeratosis. The stromal component varied from scant areas in which epithelium was closely apposed to bone to wide regions of dense connective tissue that contained fragments of keratin surrounded by foreign-body giant cells. Histologic features were consistent with a diagnosis of intraosseous epidermoid cyst. After curettage of the cyst and repulsion of the second premolar tooth, drainage was established and iodine flushes were begun. Nine months after surgery, drainage was not detectable and size of the hemimandible had decreased by approximately a fourth.
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Search related cases →Original publication: https://pubmed.ncbi.nlm.nih.gov/8755985/