Peer-reviewed veterinary case report
Dilated pore of Winer in a dog.
- Journal:
- Journal of comparative pathology
- Year:
- 2024
- Authors:
- Champion, Christopher P et al.
- Affiliation:
- Department of Population Medicine and Diagnostic Sciences · United States
Plain-English summary
A 9-year-old male neutered Goldendoodle was taken to the Animal Medical Center of Seattle because he had a firm, hairless lump on the back of his neck that had been there for two years. This lump would sometimes burst and leak a yellow-green, soft material, causing the dog a lot of pain and discomfort. To help him, the lump was surgically removed, and tests on the tissue showed it was a type of cyst called a dilated pore of Winer, which is linked to hair follicles. This condition is more commonly seen in humans and is quite rare in dogs, making this case particularly noteworthy. The treatment was successful in removing the painful mass.
Abstract
A 9-year-old male neutered Goldendoodle was presented to the Animal Medical Center of Seattle with a history of a firm, hairless, cystic mass on the dorsal aspect of the neck. The mass had been present for 2 years and would periodically rupture and discharge moderate quantities of yellow-green, soft, semi-solid, keratinaceous material. As rupture of the mass was reported to cause the patient significant pain and discomfort, it was surgically excised. Histopathology of the mass revealed a bulbous keratin-filled cyst that communicated with the external environment via a small ostium. At the base of the cyst, the cyst lining was characterized by a markedly irregular and hyperplastic stratified squamous epithelium with an overt stratum granulosum and prominent, irregularly sized, shaped and spaced rete ridges. At the superficial aspect of the cyst near the ostium, the cystic lining was characterized by a relatively thinner stratified squamous epithelium with an overt stratum granulosum and regular basal contour. Based on the histomorphological appearance of the mass, a diagnosis of a dilated pore of Winer was made. Dilated pores of Winer are follicular cysts arising from the infundibulum of the hair follicle. They are relatively common in humans and uncommon in cats, and single case reports have been described in a horse and a woodchuck (Marmota monax). To the best of the authors' knowledge, this is the first description of a dilated pore of Winer in a dog.
Find similar cases for your pet
PetCaseFinder finds other peer-reviewed reports of pets with the same symptoms, plus a plain-English summary of what was tried across them.
Search related cases →Original publication: https://pubmed.ncbi.nlm.nih.gov/38043503/