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Ameloblastoma is a rare, benign tumor of odontogenic epithelium (ameloblasts, or outside portion, of the teeth during development) much more commonly appearing in the mandible than the maxilla. While these tumors are rarely malignant or metastatic (that is, they rarely spread to other parts of the body), and progress slowly, the resulting lesions can cause severe abnormalities of the face and jaw. Additionally, because abnormal cell growth easily infiltrates and destroys surrounding bony tissues, wide surgical excision is required to treat this disorder. Further, dentists caution that wide surgical excision is not invasive enough to adequately treat this disorder. The International Statistical Classification of Diseases and Related Health Problems (most commonly known by the abbreviation ICD) provides codes to classify diseases and a wide variety of signs, symptoms, abnormal findings, complaints, social circumstances and external causes of injury or disease. ...
The International Statistical Classification of Diseases and Related Health Problems 10th Revision (ICD-10) is a coding of diseases and signs, symptoms, abnormal findings, complaints, social circumstances and external causes of injury or diseases, as classified by the World Health Organization (WHO). ...
// C00-D48 - Neoplasms (C00-C14) Malignant neoplasms, lip, oral cavity and pharynx (C00) Malignant neoplasm of lip (C01) Malignant neoplasm of base of tongue (C02) Malignant neoplasm of other and unspecified parts of tongue (C03) Malignant neoplasm of gum (C04) Malignant neoplasm of floor of mouth (C05) Malignant neoplasm of...
The International Statistical Classification of Diseases and Related Health Problems (most commonly known by the abbreviation ICD) provides codes to classify diseases and a wide variety of signs, symptoms, abnormal findings, complaints, social circumstances and external causes of injury or disease. ...
The following is a list of codes for International Statistical Classification of Diseases and Related Health Problems. ...
The International Classification of Diseases for Oncology (ICD-O) is a domain specific extension of the International Statistical Classification of Diseases and Related Health Problems for tumor diseases. ...
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Medical Subject Headings (MeSH) is a huge controlled vocabulary (or metadata system) for the purpose of indexing journal articles and books in the life sciences. ...
Look up Benign in Wiktionary, the free dictionary. ...
This article is about the epithelium as it relates to animal anatomy. ...
Tumor (American English) or tumour (British English) originally means swelling, and is sometimes still used with that meaning. ...
In medicine, malignant is a clinical term that means to be severe and become progressively worse, as in malignant hypertension. ...
Metastasis (Greek: change of the state) is the spread of cancer from its primary site to other places in the body. ...
A lesion is a non-specific term referring to abnormal tissue in the body. ...
For other uses, see Face (disambiguation). ...
Human jaw front view Human jaw left view Human jaw top view The jaw is either of the two opposable structures forming, or near the entrance to, the mouth. ...
Subtypes
There are three main clinical subtypes of ameloblastoma: unicystic, multicystic, peripheral. A fourth subtype, malignant, has been considered by some oncologic specialists, however, this form of the tumor is rare and may be simply a manifestation of one of the three main subtypes.
Clinical features Ameloblastomas are often associated with the presence of unerupted teeth. Symptoms include painless swelling, facial deformity if severe enough, pain if the swelling impinges on other structures, loose teeth, ulcers, and periodontal (gum) disease. Lesions will occur in the mandible and maxilla,although 75% occur in the ascending ramus area and will result in extensive and grotesque deformitites of the mandible and maxilla. In the maxilla it can extend into the maxillary sinus and floor of the nose. The lesion has a tendency to expand the bony cortices because slow growth rate of the lesion allows time for periosteum to develop thin shell of bone ahead of the expanding lesion. This shell of bone cracks when palpated and this phenomenon is referred to as "Egg Shell Cracking" or crepitus, an important diagnostic feature. Ameloblastoma is tentatively diagnosed through radiographic examination and must be confirmed by histological examination (e.g., biopsy). Radiographically, it appears as a lucency in the bone of varying size and features--sometimes it is a single, well-demarcated lesion whereas it often demonstrates as a multiloculated "soap bubble" appearance. Resorption of roots of involved teeth can be seen in some cases, but is not unique to ameloblastoma. The disease is most often found in the posterior body and angle of the mandible, but can occur anywhere in either the maxilla or mandible. Types of teeth Molars are used for grinding up foods Carnassials are used for slicing food. ...
This article is about the medical term Crepitus, for the Roman god, see Crepitus (mythology) Crepitus is a medical term to describe the grating, crackling or popping sounds and sensations experienced under the skin and joints. ...
Radiography is the creation of radiographs, photographs made by exposing a photographic film or other image receptor to X-rays. ...
Brain biopsy A biopsy (in Greek: bios = life and opsy = look/appearance) is a medical test involving the removal of cells or tissues for examination. ...
Ameloblastoma is often associated with bony-impacted wisdom teeth--one of the many reasons dentists recommend having them extracted.
Histopathology Histopathology will show cells that have the tendency to move the nucleus away from the basement membrane. This process is referred to as "Reverse Polarization". The follicular type will have outer arrangement of columnar or palisaded ameloblast like cells and inner zone of triangular shaped cells resembling stellate reticulum in bell stage. The central cells sometimes degenerate to form central microcysts.The plexiform type has epithelium that proliferates in a "Fish Net Pattern". The plexiform ameloblastoma shows epithelium proliferating in a 'cord like fashion', hence the name 'plexiform'. There are layers of cells in between the proliferating epithelium with a well-formed desmosomal junctions, simulating spindle cell layers.
Variants Desmoplastic Ameloblastoma, Granular Cell variant, Basal Cell variant.
Treatment Ameloblastomas are relatively resistant to chemotherapy or radiation therapy, thus, surgery is the most common treatment of this tumor. Because of the invasive nature of the growth, excision of normal tissue near the tumor margin is often required. Some have likened the disease to basal cell carcinoma (a skin cancer) in its tendency to spread to adjacent bony and sometimes soft tissues without metastasizing. While not a cancer that actually invades adjacent tissues, ameloblastoma is suspected to spread to adjacent areas of the jaw bone via marrow space. Thus, wide surgical margins that are clear of disease are required for a good prognosis. This is very much like surgical treatment of cancer. Often, treatment requires excision of entire portions of the jaw. Recurrence is common. Chemotherapy is the use of chemical substances to treat disease. ...
Varian Clinac 2100C Linear Accelerator Radiation therapy (or radiotherapy) is the medical use of ionizing radiation as part of cancer treatment to control malignant cells (not to be confused with radiology, the use of radiation in medical imaging and diagnosis). ...
âSurgeonâ redirects here. ...
References - Zahid,Arsalan from Contemporary Oral and Maxillofacial Pathology
Support link Adult Rare Brain Tumors | Oral Pathology: Oral pathology (K00-K14, 520-529) | | Developmental Anomalies | Anodontia/Hypodontia - Hyperdontia - abnormalities of size and form of teeth (Concrescence, Fusion, Gemination, Dens evaginatus/Talon cusp, Dens invaginatus, Enamel pearl, Macrodontia, Microdontia, Taurodontism) - disturbances in tooth formation (Dilaceration, Regional odontodysplasia, Turner's hypoplasia) - other hereditary disturbances in tooth structure (Amelogenesis imperfecta, Dentinogenesis imperfecta, Dentin dysplasia) | | Hard, Soft and Periapical Tissues | Attrition - Abrasion - Ankylosis - Dental caries - Denticles - Erosion - External resorption - Fluorosis - Gingivitis - Impaction - Internal resorption - Periodontitis - Pulpitis - Ulcer | | Dentofacial Anomalies | Malocclusion - Micrognathism - Prognathism - Retrognathism - Temporomandibular joint disorder | | Maxillomandibular anomalies | Odontogenic keratocyst - Torus mandibularis - Torus palatinus - Cherubism - Ameloblastoma | | Salivary glands | Drooling - Benign lymphoepithelial lesion - Necrotizing sialometaplasia - Ranula - Sialadenitis - Sialolithiasis - Stomatitis - Xerostomia - Aphthous ulcer | | Lip and Oral mucosa | Angular cheilitis - Erythroplakia - Hairy leukoplakia - Leukoplakia | | Tongue | Geographic tongue - Fissured tongue - Glossitis - Glossodynia - Black hairy tongue | | Soft tissue tumors and sarcomas (ICD-O 8800-9349) | | Not otherwise specified (8800-8809) | Soft tissue sarcoma - Desmoplastic small round cell tumor | | Fibromatous (8810-8839) | Fibroma/fibrosarcoma - Malignant fibrous histiocytoma - Dermatofibroma/dermatofibrosarcoma - Dermatofibrosarcoma protuberans | | Myxomatous (8840-8849) | Myxoma - Ossifying fibromyxoid tumour | | Lipomatous (8850-8889) | Lipoma/liposarcoma (Angiomyolipoma) | | Myomatous (8890-8929) | Leiomyoma/leiomyosarcoma - Myoma - Rhabdomyoma/rhabdomyosarcoma - Sarcoma botryoides | | Complex Mixed And Stromal (8930-8999) | Adenomyoma - Pleomorphic adenoma - Mixed Mullerian tumor - Mesoblastic nephroma - Wilms' tumor - Rhabdoid tumour - Clear cell sarcoma of the kidney - Hepatoblastoma - Carcinosarcoma | | Fibroepithelial (9000-9039) | Brenner tumour - Fibroadenoma - Phyllodes tumor | | Synovial-like (9040-9049) | Synovial sarcoma - Clear cell sarcoma, NOS | | Mesothelial (9050-9059) | Mesothelioma - Adenomatoid tumor | | Germ cell tumors (9060-9119) | germinomatous germ cell tumors: Dysgerminoma - Germinoma - Seminoma nongerminomatous germ cell tumors: Embryonal carcinoma - Endodermal sinus tumor / Yolk sac tumor - Teratoma/Fetus in fetu / Dermoid cyst/Struma ovarii - Gestational trophoblastic disease (Hydatidiform mole) - Choriocarcinoma - Polyembryoma - Gonadoblastoma | | Vascular (9120-9179) | blood vessels: Hemangioma/hemangiosarcoma - Angioma/angiosarcoma - Blue rubber bleb nevus syndrome - Hemangioendothelioma - Kaposi's sarcoma - Hemangiopericytoma lymphatic vessels: Lymphangioma/lymphangiosarcoma - Lymphangioleiomyomatosis | Osseous and chondromatous (9180-9349) | Osteoma/osteosarcoma - Osteochondroma - Chondroma/enchondroma/chondrosarcoma - Chondroblastoma - Giant cell tumor of bone - Ewing's sarcoma - Chordoma teeth/odontogenic: (Cementoblastoma, Cementoma, Odontoma, Adenomatoid odontogenic tumor, Ameloblastoma) For other uses, see Mouth (disambiguation). ...
A renal cell carcinoma (chromophobe type) viewed on a hematoxylin & eosin stained slide Pathologist redirects here. ...
Oral pathology, also known in the United States of America as oral and maxillofacial pathology is the specialty of dentistry and pathology which deals with the nature, identification, and management of diseases affecting the oral and maxillofacial regions. ...
In dentistry, anodontia, also called anodontia vera, is a rare genetic disorder characterized by the congenital absence of all primary or permanent teeth. ...
In dentistry, hypodontia is the condition of naturally having fewer than the regular number of teeth. ...
This does not cite its references or sources. ...
Concrescence is a condition of teeth where the cementum overlying the roots of at least two teeth join together. ...
In dentistry, tooth fusion is the joining of two teeth, resulting in a single large tooth. ...
Gemination is when, during development, a tooth splits to form what appears to be two teeth. ...
Dens envaginatus is a condition found in teeth where the outer surface appears to form an extra bump or cusp. ...
A talon cusp, also known as an eagles talon, is an extra cusp on an anterior tooth. ...
Dens invaginatus, also known as dens in dente, is a condition found in teeth where the outer surface folds inward. ...
An enamel pearl is a condition of teeth where enamel is found on locations where enamel is not supposed to be, such as on a root surface. ...
Macrodontia is a condition in which the teeth appear larger than normal. ...
Microdontia is a condition in which teeth appear smaller than normal. ...
Taurodontism is a condition found in teeth where the body of the tooth and pulp chamber is enlarged. ...
It is a developmental disturbance in shape of teeth. ...
Regional odontodysplasia is a developmental abnormality of teeth, usually localized to a certain area and nonhereditary. ...
Turners hypoplasia is an abnormality found in teeth. ...
Amelogenesis Imperfecta is an inherited condition that presents abnormal formation of the enamel or external layer of teeth. ...
Dentinogenesis imperfecta is a genetic disorder of tooth development. ...
Dentin dysplasia is a genetic disorder of teeth, commonly exhibiting an autosomal dominant inheritance. ...
Attrition is the loss of tooth structure due to by mechanical forces from opposing teeth. ...
Abrasion is the loss of tooth structure by mechanical forces from a foreign element. ...
Ankylosis, or Anchylosis is a stiffness of a joint, the result of injury or disease. ...
Denticles are body surface structures found on some fish and insects. ...
Erosion is the loss of tooth structure due to chemical dissolution by acids not of bacterial origin. ...
External resorption is a condition of a tooth where the root surface is lost. ...
Picture of a mild case of fluorosis. ...
This article does not cite any references or sources. ...
A medical condition that can occur mainly in reptiles when they consume something that they cannot digest. ...
Internal resorption is an unusual condition of a tooth when the dentin and pulpal walls begin to resorb centrally within the root canal. ...
Periodontitis, formerly known as Pyorrhea alveolaris, is the name of a collection of inflammatory diseases affecting the tissues that surround and support the teeth. ...
Pulpitis is an inflammation of the dental pulp. ...
Mouth ulcer on the lower lip An oral ulcer (from Latin ulcus) is the name for the appearance of an open sore inside the mouth caused by a break in the mucous membrane or the epithelium on the lips or surrounding the mouth. ...
A malocclusion refers to the misalignment of teeth and/or incorrect relation between the teeth of the two dental arches. ...
Micrognathism (or Micrognathia) is a condition where the jaw is undersized. ...
This article or section is in need of attention from an expert on the subject. ...
Retrognathism (or retrognathia) is a type of malocclusion which refers to a mandible which is further posterior than would be expected. ...
Temporomandibular joint disorder (TMJD, TMJ or TMD), or TMJ syndrome, is an umbrella term covering acute or chronic inflammation of the temporomandibular joint, which connects the lower jaw to the skull. ...
An odontogenic keratocyst is a benign but locally aggressive developmental odontogenic cyst. ...
These are an example of large mandibular tori. ...
This is an example of palatal torus. ...
Cherubism is a rare genetic disorder that causes prominace in the lower portion in the face. ...
The salivary glands produce saliva, which keeps the mouth and other parts of the digestive system moist. ...
Drooling (also known as ptyalism) is when saliva flows outside the mouth. ...
Benign lymphoepithelial lesion is a type of benign enlargement of the parotid and/or lacrimal glands. ...
Necrotizing sialometaplasia is an ulcer which feels as if it causes part of the hard palate to fall out. ...
A ranula is a type of mucocele found on the floor of the mouth. ...
Sialadenitis is inflammation of a salivary gland. ...
The introduction to this article provides insufficient context for those unfamiliar with the subject matter. ...
Stomatitis is an inflammation of the mucous lining of any of the structures in the mouth, which may involve the cheeks, gums, tongue, lips, and roof or floor of the mouth. ...
Xerostomia is the medical term for a dry mouth due to a lack of saliva. ...
An aphthous ulcer or canker sore is a type of mouth ulcer which presents as a painful open sore inside the mouth, caused by a break in the mucous membrane. ...
For other uses, see Lip (disambiguation). ...
The mucous membranes (or mucosae; singular: mucosa) are linings of ectodermic origin, covered in epithelium, and are involved in absorption and secretion. ...
A condition where there are deep cracks and splits at the corners of the mouth. ...
Erythroplakia is a flat red patch or lesion on the oral or pharyngeal surfaces. ...
Hairly leukoplakia is a white patch on the side of the tongue with a corrugated or hairy appearance. ...
Leukoplakia is a condition of the mouth that involves the formation of white leathery spots on the mucous membranes of the tongue and inside of the mouth. ...
For other uses, see Tongue (disambiguation). ...
Geographic tongue (Migratory glossitis) is a medical condition that affects the tongue. ...
Fissured tongue is a benign condition characterized by deep grooves (fissures) in dorsum of tongue. ...
Glossitis is inflammation or infection of the tongue. ...
Glossodynia or burning mouth syndrome (BMS) is a condition characterized by a burning or tingling sensation on the lips, tongue, or entire mouth. ...
A picture of Black hairy tongue. ...
In medicine, the term soft tissue refers to tissues that connect, support, or surround other structures and organs of the body. ...
For malignant tumors specifically, see cancer. ...
A sarcoma is a cancer of the connective or supportive tissue (bone, cartilage, fat, muscle, blood vessels) and soft tissue. ...
The International Classification of Diseases for Oncology (ICD-O) is a domain specific extension of the International Statistical Classification of Diseases and Related Health Problems for tumor diseases. ...
Malignant (cancerous) tumors that develop in soft tissue are called sarcomas, a term that comes from a Greek word meaning fleshy growth. ...
Display of small round blue cells characteristic of desmoplastic small round cell tumor. ...
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Soft Fibroma (fibroma molle). ...
Fibrosarcoma (fibroblastic sarcoma) is a malignant tumor derived from fibrous connective tissue and characterized by immature proliferating fibroblasts or undifferentiated anaplastic spindle cells. ...
Malignant fibrous histiocytoma (MFH) is a type of cancer that is the most common soft tissue sarcome of late adult life, most commonly occurring between age 50-70. ...
Dermatofibromas are harmless benign skin growths, found especially on the legs, that range in size from about 0. ...
Dermatofibrosarcoma protuberans (DFSP)[1] is a rare tumor. ...
Dermatofibrosarcoma protuberans (DFSP) is a rare neoplasm of the dermis layer of the skin, and is classified as a sarcoma. ...
A myxoma (Myxo- = Latin for mucus) is the most common primary tumor of the heart. ...
Adipose tissue is one of the main types of connective tissue. ...
A lipoma is a common, benign tumor composed of fatty tissue. ...
Liposarcoma is a malignant tumor that arises in fat cells in deep soft tissue, such as that inside the thigh or in the retroperitoneum. ...
Multiple angiomyolipoma from a contrast-enhanced CT of the abdomen of a patient with TSC. Angiomyolipoma is a benign renal lesion. ...
For other uses of Muscles, see Muscles (disambiguation). ...
A leiomyoma (plural is leiomyomata) is a benign smooth muscle neoplasm that is not premalignant. ...
Leiomyosarcoma is a type of sarcoma which is a neoplasm of smooth muscle. ...
A myoma is a benigne tumor and non-cancerous that grows in the uterous muscular tissue or myometrium. ...
A rhabdomyoma is a benign tumor of muscle. ...
A rhabdomyosarcoma is a type of cancer, specifically a sarcoma (cancer of connective tissues), in which the cancer cells are thought to arise from skeletal muscle progenitors. ...
Sarcoma botryoides, also known as embryonal rhabdomyosarcoma, is a rare vaginal cancer. ...
Adenomyoma is a form of adenomyosis that forms a mass or growth around the tissue of the inner uterus. ...
Pleomorphic adenoma is the most common type of parotid gland tumor. ...
Wilms tumor is a neoplasm of the kidneys that typically occurs in children. ...
There are very few or no other articles that link to this one. ...
Hepatoblastoma is an uncommon malignant liver neoplasm occurring in infants and children and composed of tissue resembling fetal or mature liver cells or bile ducts. ...
Brenner tumours (aka Transitional cell tumours) are part of the surface epithelial-stromal tumour group of ovarian neoplasms. ...
Fibroadenoma of the breast is a benign tumor characterized by proliferation of both glandular and stromal elements. ...
This article needs to be wikified. ...
Synovial joints (or diarthroses, or diarthroidal joints) are the most common and most moveable type of joints in the body. ...
// Introduction A synovial sarcoma is one of the rarer types of soft-tissue sarcomas. ...
Clear cell tumors are part of the surface epithelial-stromal tumor group of ovarian neoplasms, accounting for 6% of all neoplastic cases. ...
The mesothelium is a membrane that forms the lining of several body cavities: the pleura (thoracal cavity), peritoneum (abdominal cavity) and pericardium (heart sac). ...
Germ cell tumours are ovarian neoplasms derived from germ cells. ...
Germinomas are neoplasia (commonly referred to as cancers or tumors) which most closely resemble germ line cells. ...
Germinomas are neoplasia (commonly referred to as cancers or tumors) which most closely resemble germ line cells. ...
Germinomas are neoplasia (commonly referred to as cancers or tumors) which most closely resemble germ line cells. ...
The embryonal carcinoma is one of the four types of testicular cancers, which also include the seminoma, teratoma, and choriocarcinoma. ...
Endodermal sinus tumor, formerly often known as yolk sac tumor, is a member of the germ cell tumor group of neoplasms. ...
Yolk sac tumours are members of the germ cell tumour group of ovarian neoplasms. ...
Look up teratoma in Wiktionary, the free dictionary. ...
A parasitic twin is the result of a situation related to the process that results in teratomas, vanishing twin, and conjoined twins – two unique embryos begin developing in utero, but something goes wrong. ...
A dermoid cyst is a teratoma that contains developmentally mature skin, with hair follicles and sweat glands, sometimes luxuriant clumps of long hair, and often pockets of sebum, blood, or fat. ...
A teratoma is a type of tumor that derives from pluripotent germ cells. ...
Gestational trophoblastic disease — usually referred to as a mole — is a very rare abnormality of pregnancy in the reproductive female that involves abnormal trophoblast proliferation. ...
Choriocarcinoma is a rare cancer of the placenta, curable by chemotherapy. ...
Polyembryoma is a rare, very aggressive form of germ cell tumor usually found in the ovaries. ...
A gonadoblastoma is a complex neoplasm composed of a mixture of gonadal elements, such as large primordial germ cells, immature Sertoli cells or granulosa cells of the sex cord, and gonadal stromal cells. ...
For transport in plants, see Vascular tissue. ...
f you all The blood vessels are part of the circulatory system and function to transport blood throughout the body. ...
Hemangioma is a benign tumor, usually in the shape of a ball, but sometimes a flatter mat, formed by a collection of excess blood vessels in an area. ...
Hemangiosarcoma is a rapidly growing, highly invasive variety of cancer. ...
Angiomas are benign tumors that are made up of small blood vessels. ...
Angiosarcoma is a rare, malignant tumor consisting of endothelial and fibroblastic tissue that proliferates and eventually surrounds vascular channels. ...
Blue rubber bleb nevus syndrome (or BRBNS, or blue rubber bleb syndrome, or blue rubber-bleb nevus, or Bean syndrome) is a rare disorder that consists mainly of abnormal blood vessels affecting the gastrointestinal tract. ...
Hemangioendothelioma is used to describe a group of vascular neoplasms that may be considered benign or malignant in their activity. ...
A hemangiopericytoma (HPC) is a type of soft tissue sarcoma that originates in the pericytes in the walls of capillaries. ...
Lymph originates as blood plasma lost from the circulatory system, which leaks out into the surrounding tissues. ...
Lymphangioma is a uncommon benign slow-growing congenital tumor derived of the lymphatic vessels. ...
Lymphangioma is a uncommon benign slow-growing congenital tumor derived of the lymphatic vessels. ...
Lymphangioleiomyomatosis (LAM) is the result of disorderly smooth muscle proliferation throughout the bronchioles, alveolar septa, perivascular spaces, and lymphatics, resulting in the obstruction of small airways (leading to pulmonary cyst formation and pneumothorax) and lymphatics (leading to chylous pleural effusion). ...
This article is about the skeletal organs. ...
Cartilage is a type of dense connective tissue. ...
An osteoma is a new piece of bone growing on another piece, typically the skull. ...
Osteosarcoma is the most common type of malignant bone cancer, accounting for 35% of primary bone malignancies. ...
Osteochondroma is a type of benign tumor that consists of cartilage and bone. ...
A chondroma is a benign cartilaginous tumor, which is encapsulated with a lobular growing pattern. ...
An Enchondroma is a cartiledge cyst found in the bone marrow, e. ...
A chondrosarcoma is a cancer of the cartilage. ...
Chondroblastoma is a rare bone tumor, usually benign with a slow-growing nature. ...
Giant cell tumor of the bone (also called giant cell myeloma or osteoclastoma) is a relatively uncommon tumor. ...
X-Ray of a child with Ewings sarcoma of the tibia Ewings sarcoma is the common name for primitive neuroectodermal tumor. ...
Spinal tumors are neoplasms located in the spinal cord. ...
Cementoblastoma, or benign cementoblastoma, is a relatively uncommon benign neoplasm of the cementum of the teeth. ...
The odontoma is a hamartoma (benign tumor) of odontogenic origin. ...
The adenomatoid odontogenic tumor is an odontogenic tumor arising from the enamel organ or dental lamina. ...
Adamantinoma | |