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Updated: Jan 2, 2026

Canalostomy As a Surgical Approach to Local Drug Delivery into the Inner Ears of Adult and Neonatal Mice
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Partial vertical ear canal resection in two cats.

Michael M Pavletic

    Journal of the American Veterinary Medical Association
    |December 4, 2019
    PubMed
    Summary
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    Partial resection of the ear canal effectively treated obstructive skin lesions in two cats. This less invasive surgical approach offered excellent cosmetic and functional outcomes, avoiding complete ear canal removal.

    Area of Science:

    • Veterinary Dermatology
    • Otolaryngology
    • Surgical Oncology

    Background:

    • Obstructive skin lesions around the ear canal can cause otitis externa in cats.
    • Ceruminous gland adenomas and cystomatosis are potential causes of these growths.

    Purpose of the Study:

    • To evaluate the efficacy of partial vertical ear canal resection for obstructive lesions.
    • To compare this technique to complete resection.

    Main Methods:

    • Two cats with obstructive ear canal lesions underwent partial resection of the affected ear canal segment.
    • Surgical margins were sutured to preserve ear anatomy.

    Main Results:

    • Both cats experienced disease resolution post-surgery.

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  • One cat developed a recurrence (adenocarcinoma) treated successfully with further resection.
  • Excellent functional and cosmetic outcomes were achieved.

    • Conclusions:

    • Partial vertical ear canal resection is a viable, less invasive alternative to complete resection for upper ear canal lesions.
    • The procedure is simpler, less traumatic, and yields superior cosmetic results.