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Casey J LeBlanc1, Christopher S Roberts, Rudy W Bauer
1Department of Pathobiological Sciences, School of Veterinary Medicine, Louisiana State University, Baton Rouge, LA, USA. cleblanc@utk.edu
Veterinary Clinical Pathology
|December 1, 2004
Summary
A Miniature Schnauzer with metastatic adenocarcinoma showed unusual azurophilic vacuoles in malignant cells. These glycogen-containing vacuoles may help diagnose primary tumors in veterinary oncology.
Area of Science:
- Veterinary Oncology
- Cytopathology
- Canine Cancer Research
Background:
- Prostatic adenocarcinoma is a common malignancy in intact male dogs.
- Metastasis can occur to various organs, including bone.
- Cytologic evaluation is crucial for diagnosing cancer in animals.
Observation:
- A 9-year-old Miniature Schnauzer presented with bone masses and an enlarged prostate.
- Fine-needle aspiration revealed malignant cells with unique azurophilic cytoplasmic vacuoles.
- These vacuoles contained glycogen, confirmed by cytochemical and immunohistochemical analysis.
Findings:
- The cytologic diagnosis was metastatic adenocarcinoma, suspected to be of prostatic origin.
- Histopathology confirmed prostatic adenocarcinoma with widespread metastasis.
- The azurophilic vacuoles were an unusual feature not consistently seen in prostatic or urinary bladder tumors.
Implications:
- The presence of these specific vacuoles can aid in differential diagnoses for epithelial tumors in veterinary medicine.
- This case highlights the importance of detailed cytologic and histopathologic evaluation.
- Further research may elucidate the role of these vacuoles in tumor behavior and prognosis.