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Updated: Jun 5, 2026
09:21
Tumorsphere Derivation and Treatment from Primary Tumor Cells Isolated from Mouse Rhabdomyosarcomas
Published on: September 13, 2019
Rhabdomyosarcoma in 8 horses
W L Castleman1, D E Toplon, C K Clark
1Department of Infectious Diseases and Pathology, College of Veterinary Medicine, University of Florida, PO Box 110880, Gainesville, FL 32611-0880, USA. castlemanw@ufl.edu
Veterinary Pathology
|January 26, 2011
Summary
This study details eight equine rhabdomyosarcoma cases, finding smaller tumors (<10 cm) treatable with surgery or radiation, while larger ones often proved inoperable. Early detection and treatment are crucial for better outcomes in horses.
Area of Science:
- Veterinary Pathology
- Equine Oncology
Background:
- Rhabdomyosarcoma, a malignant tumor of muscle tissue, can occur in horses.
- Understanding the presentation and prognosis of equine rhabdomyosarcoma is essential for diagnosis and treatment.
Observation:
- Eight cases of equine rhabdomyosarcoma were analyzed, with primary sites including the head, abdominal wall, shoulder, and heart.
- Tumor size significantly impacted treatment outcomes: smaller tumors (<10 cm) showed no recurrence after surgical excision or radiation.
- Larger tumors (>10 cm) in the abdominal wall and shoulder were inoperable, leading to euthanasia.
Findings:
- The majority of tumors were classified as embryonal rhabdomyosarcoma, with one pleomorphic case identified.
- Common locations for equine rhabdomyosarcoma across this and previous studies include limb muscles and the tongue.
- Metastasis was not observed in the current study's cases, contrasting with previous reports.
Implications:
- Tumor size is a critical prognostic factor in equine rhabdomyosarcoma.
- Surgical excision and radiation therapy are effective for smaller rhabdomyosarcomas, offering a positive prognosis.
- Further research into equine rhabdomyosarcoma, particularly regarding metastasis and treatment of larger tumors, is warranted.
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