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Case Report


Radiotherapy in combination with exenteration and partial orbitectomy for orbital multilobular tumor of bone in a Cocker Spaniel

Natthanet Sritrakoon, Winutpuksinee Wibulchan, Winyu Karntip, Theerapol Sirinarumitr, Aree Thayananuphat.


Abstract
Background:
Multilobular tumor of bone or multilobular osteochondrosarcoma is a tumor of flat bone in the skull. The treatment of choice for a multilobular tumor of bone is local aggressive surgical excision.
Case Description:
A female Cocker Spaniel dog aged 11 years presented with a history of globe displacement of the right eye for 3 months. Ophthalmic examination revealed exophthalmos, third eyelid protrusion and slightly increased intraocular pressure OD. Computed tomography (CT) revealed a mass effect in the right retrobulbar, maxilla, zygomatic, and temporal areas. Right zygomatic and temporal bone lysis was observed. Physical examination, hematology, and blood chemistry results were within normal limits. Exenteration with zygomatic arch removal was performed. During surgery, a firm 2-lobed mass (4.8x3.7 cm and 1.6x1.4 cm) adhered to the mandible was found in the retrobulbar area OD. Histopathological findings revealed a multilobular tumor of bone. CT imaging was performed for the remaining tumor and an extended part of the right retrobulbar mass was found. Hypofractioned radiotherapy with 6 fractions of 6 Gy was performed on days 0, 7, 14, 21, 28, and 35. At 1 month and 4 months follow-up inspections, the mass gradually reduced in size. At 8 months and 11 months after radiotherapy, the mass was unremarkable. The dog was alert during all follow-up periods to 1 year and 8 months after hypofractioned radiotherapy combined with exenteration and partial orbitectomy.
Conclusions:
Hypofractioned radiotherapy combined with exenteration and partial orbitectomy extended the patient’s survival and decreased the size of the remaining tumor for the management of orbital multilobular tumor of bone in this dog for at least 1 year and 8 months.

Key words: Dog, Exenteration, Multilobular tumor of bone, Orbitectomy, Radiotherapy


 
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How to Cite this Article
Pubmed Style

Sritrakoon N, Wibulchan W, Karntip W, Sirinarumitr T, Thayananuphat A. Radiotherapy in combination with exenteration and partial orbitectomy for orbital multilobular tumor of bone in a Cocker Spaniel. Open Vet J. 2023; 13(11): 1485-1490. doi:10.5455/OVJ.2023.v13.i11.13

Web Style

Sritrakoon N, Wibulchan W, Karntip W, Sirinarumitr T, Thayananuphat A. Radiotherapy in combination with exenteration and partial orbitectomy for orbital multilobular tumor of bone in a Cocker Spaniel. https://www.openveterinaryjournal.com/?mno=161732 [Access: January 21, 2025]. doi:10.5455/OVJ.2023.v13.i11.13

AMA (American Medical Association) Style

Sritrakoon N, Wibulchan W, Karntip W, Sirinarumitr T, Thayananuphat A. Radiotherapy in combination with exenteration and partial orbitectomy for orbital multilobular tumor of bone in a Cocker Spaniel. Open Vet J. 2023; 13(11): 1485-1490. doi:10.5455/OVJ.2023.v13.i11.13


Vancouver/ICMJE Style

Sritrakoon N, Wibulchan W, Karntip W, Sirinarumitr T, Thayananuphat A. Radiotherapy in combination with exenteration and partial orbitectomy for orbital multilobular tumor of bone in a Cocker Spaniel. Open Vet J. (2023), [cited January 21, 2025]; 13(11): 1485-1490. doi:10.5455/OVJ.2023.v13.i11.13


Harvard Style

Sritrakoon, N., Wibulchan, . W., Karntip, . W., Sirinarumitr, . T. & Thayananuphat, . A. (2023) Radiotherapy in combination with exenteration and partial orbitectomy for orbital multilobular tumor of bone in a Cocker Spaniel. Open Vet J, 13 (11), 1485-1490. doi:10.5455/OVJ.2023.v13.i11.13


Turabian Style

Sritrakoon, Natthanet, Winutpuksinee Wibulchan, Winyu Karntip, Theerapol Sirinarumitr, and Aree Thayananuphat. 2023. Radiotherapy in combination with exenteration and partial orbitectomy for orbital multilobular tumor of bone in a Cocker Spaniel. Open Veterinary Journal, 13 (11), 1485-1490. doi:10.5455/OVJ.2023.v13.i11.13


Chicago Style

Sritrakoon, Natthanet, Winutpuksinee Wibulchan, Winyu Karntip, Theerapol Sirinarumitr, and Aree Thayananuphat. "Radiotherapy in combination with exenteration and partial orbitectomy for orbital multilobular tumor of bone in a Cocker Spaniel." Open Veterinary Journal 13 (2023), 1485-1490. doi:10.5455/OVJ.2023.v13.i11.13


MLA (The Modern Language Association) Style

Sritrakoon, Natthanet, Winutpuksinee Wibulchan, Winyu Karntip, Theerapol Sirinarumitr, and Aree Thayananuphat. "Radiotherapy in combination with exenteration and partial orbitectomy for orbital multilobular tumor of bone in a Cocker Spaniel." Open Veterinary Journal 13.11 (2023), 1485-1490. Print. doi:10.5455/OVJ.2023.v13.i11.13


APA (American Psychological Association) Style

Sritrakoon, N., Wibulchan, . W., Karntip, . W., Sirinarumitr, . T. & Thayananuphat, . A. (2023) Radiotherapy in combination with exenteration and partial orbitectomy for orbital multilobular tumor of bone in a Cocker Spaniel. Open Veterinary Journal, 13 (11), 1485-1490. doi:10.5455/OVJ.2023.v13.i11.13


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