Ameloblastoma of the Oral Cavity (Oral Cancer Originating from Cells of the Tooth Anlage) in Dogs
- Synonyms: Adamantinoma
- Occurrence: rarer
- Location of disease: Head/Neck
When to visit the vet?
Non-urgent see a veterinarian within 2–3 days
If the condition worsens / symptoms persist, consult a veterinarian.
Definition
Ameloblastoma is a rare, locally invasiveInvasive describes medical procedures or pathogens that enter the body or penetrate tissue. In medicine, invasive procedures can range from minimally invasive techniques to open surgery., epithelial tumorA tumor is an abnormal growth of tissue that can be benign or malignant. Tumors can develop in any part of the body and affect various functions.. It develops from cells of the enamel organ (ameloblasts) and is characterized by slow but infiltrative growth with severe local destructionDestruction means "demolition." In medicine, it refers to the destruction of cells, tissues, organs, or body parts. The growth of malignant Tumors is also usually accompanied by destruction of the surrounding tissue. of bone structures. Ameloblastoma metastasizes only very rarely, but is clinically highly relevant due to its destructiveDestruction means "demolition." In medicine, it refers to the destruction of cells, tissues, organs, or body parts. The growth of malignant Tumors is also usually accompanied by destruction of the surrounding tissue. spread. It is histologically distinguished from other odontogenic tumors such as odontogenic fibroma or cementoblastoma.
The most important facts at a glance
Ameloblastoma is a locally aggressive, rarely metastasizingA metastasis is a secondary tumor that originates from a primary, malignant tumor in another part of the body. Metastases indicate that cancer has spread in the body. odontogenic tumorA tumor is an abnormal growth of tissue that can be benign or malignant. Tumors can develop in any part of the body and affect various functions. in the oralOral means "through the mouth" and refers to the intake of food, medication, or other substances through the mouth. In veterinary medicine, many treatments are administered orally. cavity of dogs. Clinically, it is characterized by bony Swelling, Tooth loss, and pain. DiagnosisA diagnosis is the identification of a disease or condition by its symptoms and/or results from diagnostic tests. It is the first step in the management and treatment of patients. is made through imaging procedures and histopathologicalHistopathological refers to the microscopic examination of tissue samples for the diagnosis of diseases. This technique is used to identify the specific characteristics of diseases at the cellular level in dogs and cats. examination. Surgical removal with an adequate margin is the only curative therapyTherapy refers to the treatment of diseases or disorders with the aim of alleviating symptoms, promoting healing, or improving quality of life. Therapies can be medicinal, surgical, or through other medical interventions. option. The prognosisThe prognosis is the prediction of the likely course and outcome of a disease based on the general state of health, the nature of the disease, and the response to treatment. It can provide information on how a disease is expected to develop. is very good with early and radical treatment.
Causes
- The exact cause of ameloblastomas is unknown, but genetic factors are thought to play a role.
- Injuries or previous dental problems may also increase the risk.
- Ameloblastoma occurs preferentially in middle-aged to older dogs, with a slightly higher incidenceIncidence refers to the number of new cases of a disease or condition that occur within a specific time period in a specific population group. It provides information about the risk of contracting the disease. in brachycephalic breeds. It shows no gender predispositionA predisposition is an innate inclination or susceptibility of an organism to certain diseases or conditions. In dogs and cats, there may be a genetic predisposition to certain conditions such as hip dysplasia or certain heart diseases..
Symptoms
Ameloblastoma of the oralOral means “through the mouth” and refers to the intake of food, medication, or other substances through the mouth. In veterinary medicine, many treatments are administered orally. cavity in dogs is usually first noticed as a localized Swelling on the upper or lower jaw. As it grows, the tumorA tumor is an abnormal growth of tissue that can be benign or malignant. Tumors can develop in any part of the body and affect various functions. loosens adjacent teeth; sometimes they fall out completely, making tooth loosening or Tooth loss noticeable. The animal shows Pain when chewing, eating, or opening its mouth wide, often accompanied by bloody saliva or recurrentRecurrent refers to a disease that repeatedly returns or worsens after a temporary remission or improvement. oralOral means “through the mouth” and refers to the intake of food, medication, or other substances through the mouth. In veterinary medicine, many treatments are administered orally. Bleeding and pronounced halitosisHalitosis, or bad breath, is a condition characterized by unpleasant odors from the mouth. Causes can include dental problems, digestive system disorders, or respiratory issues. (foetor ex ore) due to necrotic tumorA tumor is an abnormal growth of tissue that can be benign or malignant. Tumors can develop in any part of the body and affect various functions. surfaces and secondary infections.
The space-occupying massIn pathology, the term “mass” is used to describe an abnormal lump or growth in the body. A mass can form in the skin or subcutaneous tissue, or even inside the body. The causes can be benign (not cancer) or malignant (cancer). causes jaw malpositions and secondary periodontitis, which further worsens oralOral means “through the mouth” and refers to the intake of food, medication, or other substances through the mouth. In veterinary medicine, many treatments are administered orally. hygiene. In advanced stages, visible deformities of the facial skull occur; the ameloblastoma can break into the nasalNasal refers to the nose and nasal cavities. In veterinary medicine, this can involve examinations, treatments, or diseases affecting the nose of dogs and cats. cavity, the hard palate, or the orbit. If it gets into nerve tissue along foraminous structures, neurological deficits rarely occur – such as sensorySensory refers to the senses or perception. Sensory systems in dogs and cats include sight, hearing, smell, taste, and touch, all of which are central to interacting with their environment. disturbances or masticatory muscle weakness. Thus, ameloblastoma clinically presents as a painfully progressiveProgressive describes a condition or disease that worsens over time. This term is often used to characterize the course of an illness that causes increasingly severe symptoms or damage., deforming massIn pathology, the term “mass” is used to describe an abnormal lump or growth in the body. A mass can form in the skin or subcutaneous tissue, or even inside the body. The causes can be benign (not cancer) or malignant (cancer). that causes local tissue destructionDestruction means “demolition.” In medicine, it refers to the destruction of cells, tissues, organs, or body parts. The growth of malignant Tumors is also usually accompanied by destruction of the surrounding tissue. in the skull region and must be treated early with surgical oncologyOncology is the branch of medicine that deals with the diagnosis, treatment, and research of cancer. In veterinary medicine, this includes the treatment of cancers in animals. to limit functional impairments and complications.
The pattern of “firm, ulcerating gum massIn pathology, the term “mass” is used to describe an abnormal lump or growth in the body. A mass can form in the skin or subcutaneous tissue, or even inside the body. The causes can be benign (not cancer) or malignant (cancer). + tooth displacement or loosening + local bone involvement” is particularly suspicious for ameloblastoma in the oralOral means “through the mouth” and refers to the intake of food, medication, or other substances through the mouth. In veterinary medicine, many treatments are administered orally. cavity.
Diagnosis
DiagnosisA diagnosis is the identification of a disease or condition by its symptoms and/or results from diagnostic tests. It is the first step in the management and treatment of patients. is based on clinical examination, diagnostic imagingDiagnostic imaging includes medical procedures that create images of the inside of the body to diagnose, monitor, or treat diseases and injuries. Examples include X-ray, ultrasound, computed tomography (CT), and magnetic resonance imaging (MRI)., and histological analysis.
- Clinical inspection and palpationPalpation is an examination method in which the condition of body tissues is assessed by feeling them with the hands. It is used to identify swelling, pain, or other abnormalities. usually show a firm, painless Swelling in the jaw area.
- X-rays of the skull and jaws show multilocular, “soap bubble-like” osteolysis with expansion of the jawbone.
- CT or MRI are helpful for assessing tumorA tumor is an abnormal growth of tissue that can be benign or malignant. Tumors can develop in any part of the body and affect various functions. extent, especially when the nasalNasal refers to the nose and nasal cavities. In veterinary medicine, this can involve examinations, treatments, or diseases affecting the nose of dogs and cats. or orbital cavityThe orbital cavity is a bony structure in the skull that surrounds the eye and its adnexa. It protects the eye and provides attachment points for the eye muscles. is involved.
- BiopsyA biopsy is a medical procedure in which a small amount of tissue is removed from the body to be examined under a microscope for signs of disease. Biopsies can help diagnose cancer and other conditions. with histopathologicalHistopathological refers to the microscopic examination of tissue samples for the diagnosis of diseases. This technique is used to identify the specific characteristics of diseases at the cellular level in dogs and cats. examination is essential for confirming the diagnosisA diagnosis is the identification of a disease or condition by its symptoms and/or results from diagnostic tests. It is the first step in the management and treatment of patients. and distinguishing it from other oralOral means "through the mouth" and refers to the intake of food, medication, or other substances through the mouth. In veterinary medicine, many treatments are administered orally. neoplasms (e.g., squamous cell carcinomaA carcinoma is a type of cancer that originates in the epithelial cells that line the inner and outer surfaces of the body. Carcinomas are the most common form of cancer., odontogenic fibroma, osteosarcoma).
Histologically, it presents as a sharply demarcated but locally invasiveInvasive describes medical procedures or pathogens that enter the body or penetrate tissue. In medicine, invasive procedures can range from minimally invasive techniques to open surgery. tumorA tumor is an abnormal growth of tissue that can be benign or malignant. Tumors can develop in any part of the body and affect various functions. with columnar ameloblasts and central enamel epithelial structures (“stellate reticulum”).
Therapy
The therapyTherapy refers to the treatment of diseases or disorders with the aim of alleviating symptoms, promoting healing, or improving quality of life. Therapies can be medicinal, surgical, or through other medical interventions. of choice is complete surgical removal with wide margins, as the tumorA tumor is an abnormal growth of tissue that can be benign or malignant. Tumors can develop in any part of the body and affect various functions. grows in a highly infiltrative manner.
- Mandibulectomy or maxillectomy (partial or complete) are required depending on the location.
- Simple tumorA tumor is an abnormal growth of tissue that can be benign or malignant. Tumors can develop in any part of the body and affect various functions. resection without bone removal almost always leads to recurrence.
- Adjuvant radiation therapyRadiation therapy is the use of radiation, most often to treat cancer. It can be used to kill cancer cells or slow their growth without significantly damaging surrounding healthy tissue. may be useful in cases that are not completely resected or in inoperable locations (e.g., near the orbit).
- ChemotherapyChemotherapy refers to the treatment of diseases, especially cancer, with chemical substances or drugs. It aims to kill cancer cells or prevent their growth, but can also affect healthy cells. is not established in the treatment of ameloblastoma.
Early surgical intervention offers the best chances of a cure. Reconstructive measures are increasingly established in veterinary oncological surgery and significantly improve quality of life.
Prognosis and follow-up care
The prognosisThe prognosis is the prediction of the likely course and outcome of a disease based on the general state of health, the nature of the disease, and the response to treatment. It can provide information on how a disease is expected to develop. is very good with complete surgical removal. Recurrences occur primarily with incomplete resection or inadequate margins. MetastasisA metastasis is a secondary tumor that originates from a primary, malignant tumor in another part of the body. Metastases indicate that cancer has spread in the body. is extremely rare. Follow-up care includes regular clinical and imaging check-ups (e.g., CT at annual intervals), especially for recurrence detection. For surgeries that limit function, physiotherapeutic support and dietary adjustments (e.g., soft food) are useful. PostoperativePostoperative refers to the time after a surgical operation. This phase includes recovery and the management of possible complications after the procedure. quality of life is very high with good care and pain management.
Prevention
To prevent ameloblastoma, early detection through regular mouth and tooth examinations is primarily important. Owners should regularly check their dog’s mouth for Swelling, Bleeding, or loose teeth. Good dental care reduces chronicChronic refers to a condition or disease that is long-lasting or permanent. Chronic diseases often develop slowly and can lead to persistent or recurring health problems over time. irritation of the gums, which can promote Tumors in the long term. X-rayX-ray is an imaging technique that uses X-rays to create images of the inside of the body. It is often used to diagnose bone fractures, lung diseases, and other conditions. examinations can reveal deep-seated changes if suspected. Dogs with a genetic predispositionA predisposition is an innate inclination or susceptibility of an organism to certain diseases or conditions. In dogs and cats, there may be a genetic predisposition to certain conditions such as hip dysplasia or certain heart diseases. should be monitored more closely. Any abnormalities in the jaw area should never be ignored but should be clarified by a veterinarian immediately to prevent spread at an early stage.
Outlook on current research
Research on ameloblastic Tumors in dogs focuses on the molecular characterization of tumorA tumor is an abnormal growth of tissue that can be benign or malignant. Tumors can develop in any part of the body and affect various functions. cells and the role of growth factors such as BMP and SHH. In vitro models are used to develop new therapeutic approaches, especially for non-resectable Tumors. The further development of imaging procedures (e.g., intraoperative navigation) and minimally invasiveInvasive describes medical procedures or pathogens that enter the body or penetrate tissue. In medicine, invasive procedures can range from minimally invasive techniques to open surgery. surgical techniques could expand therapyTherapy refers to the treatment of diseases or disorders with the aim of alleviating symptoms, promoting healing, or improving quality of life. Therapies can be medicinal, surgical, or through other medical interventions. options in the future. Genetic markers for differentiating between aggressive and less invasiveInvasive describes medical procedures or pathogens that enter the body or penetrate tissue. In medicine, invasive procedures can range from minimally invasive techniques to open surgery. tumor forms are also being researched.