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Keratoacanthoma causing beak deformity in a budgerigar (Melopsittacus undulatus)
H C Owen1, R J T Doneley, R E Schmidt
1School of Veterinary Science, The University of Queensland, St Lucia, Queensland, Australia. h.owen@uq.edu.au
Avian Pathology : Journal of the W.V.P.A
|November 13, 2007
Summary
A rare keratoacanthoma caused abnormal beak growth in a budgerigar. This avian beak tumor, similar to human and animal keratoacanthomas, led to respiratory distress.
Area of Science:
- Avian pathology
- Comparative oncology
- Veterinary dermatology
Background:
- Keratoacanthomas are typically found on sun-exposed skin in humans and animals.
- Neoplasms of the avian beak are uncommon, with limited reporting on specific tumor types.
Observation:
- A 6-year-old male budgerigar (Melopsittacus undulates) presented with abnormal maxillary beak growth.
- The bird exhibited respiratory distress despite maintaining the ability to eat.
- Histological examination revealed a neoplasm effacing the maxilla and infiltrating nasal sinuses.
Findings:
- The tumor was characterized by cyst-like proliferations of well-differentiated squamous epithelial cells with central keratinization.
- Tumor cells showed contiguity with the beak's stratum germinativum.
- This represents a novel occurrence of keratoacanthoma in an avian beak.
Implications:
- This case expands the known spectrum of keratoacanthoma presentation.
- The findings suggest potential similarities between avian beak tumors and those in other species.
- Further research may elucidate shared etiological factors or treatment strategies.
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