Vaccine-associated rhabdomyosarcoma with spinal epidural invasion and pulmonary metastasis in a cat
Journal
Veterinary Pathology
Journal Volume
43
Journal Issue
1
Pages
55-58
Date Issued
2006
Author(s)
Abstract
A 7-year-old, female, domestic medium-haired cat had a recurrent deep dermal mass in the interscapular region after initial surgical removal 3 months earlier. The cat had received a killed rabies vaccine and a five-in-one vaccine in the same area about 2 months prior to the first surgery. The relapsed mass was diagnosed as vaccine-associated sarcoma. The cat was euthanized 2 months later because of hind limb paralysis. At necropsy, multiple, poorly demarcated, nodular masses were seen in the muscles around the shoulders, neck, and thoracic vertebrae. Pulmonary metastasis and spinal epidural invasion at T1-T3 with regional cord compression and malacia were observed. Microscopically, the masses consisted of interwoven bundles of spindle cells with prominent multinucleated giant cell formation. The neoplastic cells stained strongly positive for myoglobin, and moderately but variably positive for vimentin, desmin, and α- smooth muscle actin. Phosphotungstic acid-hematoxylin staining revealed cytoplasmic striations in scattered tumor cells. The tumor was considered a vaccine-associated rhabdomyosarcoma.
Subjects
Feline; Myoglobin; PTAH; Rhabdomyosarcoma; Vaccine-associated sarcoma
SDGs
Other Subjects
rabies vaccine; animal; animal disease; article; case report; cat; cat disease; epidural space; female; immunohistochemistry; lung tumor; metastasis; pathology; rhabdomyosarcoma; Animals; Cat Diseases; Cats; Epidural Space; Female; Immunohistochemistry; Lung Neoplasms; Rabies Vaccines; Rhabdomyosarcoma; Felidae
Type
journal article