Category Archives: Biopsy

Unusual tumor of the zygomatic arch in a Dog

Unusual fibrous tumor of the zygomatic bone Continue reading

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Nasal cryptococcosis in a cat

Nasal cryptococcosis in a cat History: 4 year-old female spayed DSH cat developed a nasal swelling and inspiratory noise. Biopsies were submitted. Histopathology: Nasal turbinate:  The submucosa is expanded by large numbers of fungal yeasts forming sheets. The yeasts are 15-20 … Continue reading

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Maxillary fibrosarcoma in an alpaca

Maxillary fibrosarcoma in an alpaca History: Histopathology dated 9/30/08 from another laboratory revealed `fibroma with osseous metaplasia`. Mass appears invasive into the bone, periodontal issues, and buccal mucosa, raising concerns aboutneoplasia. Histopathology: Gingiva: Within the superficial and deep submucosa and invading … Continue reading

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Cutaneous Hemangioma in a Dog

Cutaneous Hemangioma in a dog History: Numerous skin lesions previously diagnosed with mast cell tumors. Histopathology: Within the dermis of the second biopsy on slide 2 is an unencapsulated, poorly demarcated neoplasm of endothelial-lined vascular channels ranging from 100-200 um … Continue reading

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Apocrine ductular adenoma in a cat

Apocrine ductular adenoma in a cat History: Skin biopsy from a 15 year-old cat, taken from the abdomen. Histopathology: Haired skin: The dermis contains a multilobulated, well circumscribed,unencapsulated neoplasm of epithelial cells arranged in a tubulo-papillary pattern in an abundant … Continue reading

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