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Surgical Management of Ameloblastic Fibro-Odontoma in a Buffalo.

Abstract

A ten year old buffalo was presented with large foot ball sized mass on right lower jaw since last two years. Thorough clinical examination revealed hard bony tumor with first two right incisors embedded in the mass. The mass was surgically excised under mental nerve block and cavity was packed with tincture benzoin soaked gauze. On histopathologic examination, the neoplasm showed presence of dental papilla characterized by homogenous non cellular material (dentin and enamel) lined by columnar epithelium cells (ameloblasts) embedded in myxomatous fibrous stroma thus confirming ameloblastic fibroodontoma. The buffalo made an uneventful recovery with healing through second intention.

Keywords : Ameloblastic fibro-odontoma; buffalo

Introduction

Ameloblastic fibro-odontoma is a benign epithelial odontogenic tumor. The tumor may occupy a position any where in mandible or maxilla but mostly involves the lower jaw (Tyagi and Singh, 2010). In advance cases, loose incissors are often embedded in tumorus mass. Ameloblastic fibro-odontoma is a rare tumor in domestic animal but it is the most common odontogenic neoplasm in cattle (Ueki et al., 2004). Cryotheraphy, thermocuatery and radiation therapy (Ziemer et al., 1986) have been recommended in conjunction with surgical excision to prevent tumor re-growth in oral cavity.

History and Diagnosis

A 10 year old female buffalo was presented with complaint of large foot ball sized mass on right lower jaw since last two years (Fig. 1). The animal had difficulty in mastication and deglutition. Thorough clinical examination revealed swelling to be a hard bony tumor involving first two right incisors. Clinical parameter like rectal temperature (102[degrees]F), heart rate (65 /min) and respiration rate (21/min) were within normal range. On the basis of clinical examination the swelling was tentatively diagnosed as odontogenic tumor.

Surgical Treatment and Discussion

The buffalo was restrained in lateral recumbancy and the mass was surgically excised under mental nerve block administered bilaterally by injecting 2% Lignocaine hydrochloride. Two elliptical incisions were made on dorsal and ventral aspect of growth. The tumorous growth was curetted, chiseled and loose incisor tooth were removed. 1% Potassium permagnate solution was used to wash the mouth cavity and bleeding was controlled by ligating blood vessel followed by hot iron cauterization. The cavity in mandible left after excision of growth was packed with Tincture benzoine dipped gauze. Stay suture were applied with cotton thread. Post-operatively Inj. Ceftriaxone (lntacef (a))10 mg/kg.b. wt. and Inj Meloxicam (Melonex (a)) 0.2 mg kg. b. wt. were given intramuscularly for 5 day and daily wound dressing was done till healing. The buffalo showed uneventful recovery and sutures were removed on 12th day after surgery (Fig. 2.). No recurrence was reported up to a period of 8 month.

Tumor tissue sample was fixed with 10% neutral buffered formalin solution and embedded in paraffin following the routine tissue processing. Five micron thick sections obtained from paraffin blocks were stained with Hematoxylin Eosin (H & E) technique and then examined under light microscope. Histopathologically neoplasm was composed of epithelium, dental tissues and fibrous tissue component. Neoplasm showed follicular pattern characterized by islands of epithelium with peripheral palisading of elongated columnar cells with basillar nucleus. Centrally the islands contained loosely arranged stellate cells (stellate reticulum). Follicular pattern islands were separated by mesenchyme and was often loose or myxomatous with finely stellate or spindled fibroblasts. Multifocally dentin and enamel like material lined by neoplastic epithelium embedded in mesenchymal component (Fig. 3) was visualised. On basis of histopathological examination, neoplasm was diagnosed as ameloblastic fibroodontoma.

Fibro-odontoma was observed in the particular case. Ameloblastic Fibro-odontoma in three year old Japanese ox (Masegi et al., 1994), fibrosarcoma in two cows (Britt et al., 2005), compound odontoma in heifer (Ziemer et al., 1986) have also been reported. Tumors are seen as mass like lesion causing dysphagia, pain and excessive salivation (Cheema and Shamin, 1974). Further, all incisors were involved in tumorous mass which is agreement with finding of Tyagi and Singh (2010) who also reported higher incidence of lower jaw involvement in odontoma in animals. Surgery alone was performed for management of fibro-odontoma in our case with no recurrence observed during 8 month.

References

Britt, L.G., Middleton, O.R., Valdez, R.A., Tucker, R.L., Parish, S.M. and Tyler, J.W. (2005). Facial Fibrosarcoma in two cows. Vet. Radiology Ultrasound. 39: 18-21.

Cheema, A.H. and Shamin, H. (1974). Congenital ameloblastoma in a calf. Can. Vet. J. 32: 366-67.

Masegi, T., Kudo, T., Kawada, M., Yanai, T. and Ueda, K. (1994). Ameloblastic fibroodontoma in mandibular incisor of a cow. J. Vet. Med. Sci. 56:157-59.

Tyagi, R. P. S. and Singh, J. (2010). Ruminant Surgery. (1st ed). CBS Publishers Distributors Pvt. Ltd, New Delhi. p. 185-86.

Ueki, H., Sumi, A., Takashi, H., Ito, H., Oyamada, T. and Yoshikawa, H. (2004). Malignant ameloblastic fibro-odontoma in dog. Vet. Pathol. 41: 183-85.

Walsh, K. M., Denholm, L.J. and Copper, B.J. (1987). Epithelial odontogenic tumors in domestic animal. J. Comp. Pathol. 97: 503-21.

Ziemer , E.L., Turrel, J.M., Duhamel, G. and George, L.W. (1986). Surgery and radiology for management of compound odontoma in heifer. J. Am. Vet. Med. Assoc. 189: 794-96.

K.R. Trivedi (1), Prajwalita Sutaria (2), S.H. Raval (3) and B.N. Suthar (4)

Department of Veterinary Surgery and Radiology College of Veterinary Science and Animal Husbandry Dr. V. M. Jhala Clinical Complex Sardarkrushinagar Dantiwada Agricultural University (SDAU) Deesa - 385535 (Gujarat)

(1.) Post Graduate Scholar and Corresponding author. E-mail: kashyaptrivedi.0091@gmail.com

(2.) Assistant Professor

(3.) Assistant Professor, Department of Pathology

(4.) Professor and Head, Department of Gynaecology

(a) - Brand of Intas Animal Health, Ahmedabad
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Title Annotation:Short Communication
Author:Trivedi, K.R.; Sutaria, Prajwalita; Raval, S.H.; Suthar, B.N.
Publication:Intas Polivet
Article Type:Clinical report
Date:Jul 1, 2016
Words:927
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