ACANTHOMATOUS AMELOBLASTOMA PDF

Ameloblastoma surgery What is ameloblastoma Ameloblastoma is a rare noncancerous benign locally aggressive but slow growing tumor of the jaw involving abnormal tissue growth. The resulting tumors or cysts are usually not malignant benign but the tissue growth may be aggressive in the involved area. On occasion, tissue near the jaws, such as around the sinuses and eye sockets, may become involved as well, giving rise to facial distortion. Ameloblastoma begins in the cells that form the protective enamel lining on your teeth from the residual epithelium of the tooth germ, epithelium of odontogenic cysts stratified squamous epithelium and epithelium of the enamel organ 2. Ameloblastoma occurs in men more often than it occurs in women. Though it can be diagnosed at any age, ameloblastoma is most often diagnosed in adults in their 30s and 40s.

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Monique N. Mayer; e-mail: ac. Three types of odontogenic tumors have been described in the veterinary literature: fibromatous epulis, ossifying epulis, and acanthomatous epulis 2. While fibromatous and ossifying epulides are confined to the gingiva, acanthomatous epulides often extensively invade adjacent bone 3.

Recently, the term canine acanthomatous ameloblastoma has been recommended to describe acanthomatous epulis in the dog 3. Canine acanthomatous ameloblastoma presents as an exophytic, irregular gingival mass on either side of the dental arcade, with a predilection for the rostral region of the mandible Figure 1 3. Involvement of the underlying bone is common Figure 2.

Once a histological diagnosis is known, the primary tumor should be staged using the World Health Organization WHO Classification System for tumors of the oral cavity Table 1 4. Metastasis to regional lymph nodes or other distant organs has not been reported 5. Computed tomography or magnetic resonance imaging is often recommended prior to surgical or radiation treatment to accurately determine the extent of the primary tumor 5. Magnetic resonance images have been reported to provide more accurate assessment of oral tumor margins in soft tissue and bone than computed tomographic images 6.

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Canine Acanthomatous Ameloblastoma

The rostral mandible is the most common site and they do not metastasize. Mac is an entire, male English Springer Spaniel 7 years old. He developed an oral mass affecting his right mandible in July Mac was referred to the dentistry and oral surgery service at Eastcott Referrals. A 3D model was printed for planning of the surgery and preoperative plate contouring.

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Radiation therapy for oral tumors: Canine acanthomatous ameloblastoma

Monique N. Mayer; e-mail: ac. Three types of odontogenic tumors have been described in the veterinary literature: fibromatous epulis, ossifying epulis, and acanthomatous epulis 2. While fibromatous and ossifying epulides are confined to the gingiva, acanthomatous epulides often extensively invade adjacent bone 3. Recently, the term canine acanthomatous ameloblastoma has been recommended to describe acanthomatous epulis in the dog 3.

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Acanthomatous Ameloblastoma in Dogs

Together, these growths are often classified as epulid tumors, or epulides. These tumors "have characteristics of malignancy," notes "The Textbook of Internal Veterinary Medicine," and getting rid of them requires equally aggressive treatment. The epulides are the most common benign oral tumors in dogs, but canine acanthomatous ameloblastoma is the most aggressive of the three. If left untreated, it will invade bone and tissue. They feel firm to the touch but the surface might have a bumpy, cauliflower-like appearance. Signs, Symptoms and Vulnerable Breeds Dogs of any age and breed can develop acanthomatous ameloblastoma but the tumors are most often seen in dogs age 7 or older, and certain breeds are more susceptible than others.

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