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Updated: Feb 14, 2026
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Minimum Volume Vitrification of Immature Feline Oocytes
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Mapping Feline Oncology in Portugal: A National Characterization
Paula Brilhante-Simões1,2,3, Ricardo Lopes2,3,4, Leonor Delgado1,2,5
1INNO Veterinary Laboratories, R. Cândido de Sousa 15, 4710-300 Braga, Portugal.
Animals : an Open Access Journal From MDPI
|February 13, 2026
Summary
Malignant feline tumors, especially mammary and skin cancers, are common in Portugal. Older female cats are most affected, highlighting the need for early biopsy and screening.
Area of Science:
- Veterinary Pathology
- Oncology
- Epidemiology
Background:
- Feline neoplasia represents a significant health concern in companion animals.
- Understanding national histopathology data is crucial for veterinary oncology surveillance.
Purpose of the Study:
- To analyze the histopathology caseload of feline tumors in Portugal over five years.
- To identify common tumor types, locations, and biological behaviors in cats.
Main Methods:
- Retrospective analysis of 1904 histopathology-confirmed feline neoplasms.
- Data categorized by biological behavior, anatomical location, and demographics.
- Statistical analysis of breed, geography, age, and sex associations.
Main Results:
- Malignant tumors predominated (77.4%), with mammary gland (44.8%) and cutaneous/soft tissues (42.4%) being most common.
- Mammary carcinoma, fibrosarcoma, squamous cell carcinoma, and mast cell tumors were frequent malignant types.
- Older cats and females were more prone to malignant tumors, particularly mammary neoplasia.
Conclusions:
- Malignant feline tumors are prevalent in Portugal, primarily affecting mammary and skin sites.
- Recommends early biopsy in older cats and mammary screening in females.
- Advocates for continued registry surveillance of feline tumor patterns.
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