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  1. #1
    :
    : Oct 2009
    : 1156
    : sudan
    :
    : dentist
    : 10
    : 825
    Array

    Benign non-odontogenic tumors

    Classification:Classification:
    Based on tissue type:
    Benign oral epithelial tumors: squamous cell papilloma.
    Tumors of bone:Osteoma, ossifying fibroma, osteoblastoma, osteoid osteoma.
    Tumors of cartilage: Chondroma.
    Fibrous connective tissue tumors: fibroma
    Vascular & lymphatic tumors: hemangioma, vascular malformations.
    Neural tissue tumors: schwannoma, neurofibroma.
    Tumors of muscles: leiomyoma, rhabdomyoma.
    Tumors of adipose tissues: lipoma.
    Uncertain origin: granular cell tumor.
    Squamous cell papilloma

    Vascular/lymphatic lesions
    Classification


    Vascular neoplasm: hemangioma, etc.
    Vascular malformations:
    Hemangioma
    A benign vascular neoplasm representing a hamartomatous lesion.
    Commonest benign infancy tumor.
    Female, 3:1. Caucasian.
    Site: head & neck (60%).
    Appear at or shortly after birth with rapid growth up to 6th -10th months (proliferative phase).
    Followed by ( involution phase): gradually decreases in size and resolution at age of 5-9years.

    The color of the lesion depends on depth, and phase of the lesion:
    1. Bright red (superficial), bluish (deep).
    2. Dull purple (involution phase).
    Complications: ulceration & infection, airway obstruction (larynx), DIC, scar.
    Vascular malformations
    According to type of blood vessels:
    Capillary malformation: portwine stain & telangiectasia.
    Venous malformation:
    Arterio-venous malformation.
    According to hemodynamic features:
    Low flow lesions: capillary & venous malformations.
    High flow lesions: arterio-venous malformation
    Portwine stain
    Capillary malformation commonly seen in face along the distribution of the trigeminal nerve.
    Present at birth & persist throughout life.
    Pink or purple macule which darken with age.
    It may be associated with Sturge Weber syndrome:
    Sturge Weber syndrome:
    A rare non-hereditary developmental condition characterized by hamartomatous vascular proliferation involving tissues of the brain & face.
    Portwine stain.
    Lepto-meningeal angiomas in cerebral cortex.
    Convulsive disorder.
    Mental retardation.
    X-ray: tramline calcifications on skull.
    Hereditary Hemorrhagic telangiectasia
    An autosomal dominant hereditary mucocutaneous disorder characterized by small dilated capillaries.
    Numerous pin head red papules in oral mucosa, para-oral skin, and nasal mucosa.
    Frequent episodes of epistaxis.

    Based on tissue type:
    Benign oral epithelial tumors: squamous cell papilloma.
    Tumors of bone:Osteoma, ossifying fibroma, osteoblastoma, osteoid osteoma.
    Tumors of cartilage: Chondroma.
    Fibrous connective tissue tumors: fibroma
    Vascular & lymphatic tumors: hemangioma, vascular malformations.
    Neural tissue tumors: schwannoma, neurofibroma.
    Tumors of muscles: leiomyoma, rhabdomyoma.
    Tumors of adipose tissues: lipoma.
    Uncertain origin: granular cell tumor.
    Squamous cell papilloma
    Clinical features
    Aetiology: unknown, but HPV 6, 11.
    Incubation period: 3-12 months.
    Age: 30-50 years.
    Sites: soft palate, tongue, lips, gingiva.
    Soft painless, pedunculated, exophytic with finger-like projections (cauliflower-like).
    Color: white, red, or normal in color
    Histopathology
    Exophytic proliferation of epithelium forming finger-like projections.
    Treatment
    Conservative surgical excision with the base of the lesion.
    Osteoma
    It is a benign tumor of the bone.
    Restricted to craniofacial bones.
    Age: young adult.
    Site: body of mandible, condyle, paranasal sinuses.
    Small lesion is asymptomatic.
    Condylar osteoma: painful facial swelling, shift in occlusion, limited mouth opening.
    In paranasal sinuses: headache, sinusitis, ocular manifestation.
    Multiple osteomas are seen in Gardner syndrome.
    Gardner syndrome

    Autosomal dominant condition representing part of spectrum of diseases known as familial colorectal polyposis.
    Adenomatous polyp develops during the second decade, which ultimately transform in to adenocarcinoma.
    Skeletal abnormalities: multiple osteomas, supernumerary teeth, & impacted teeth.
    Epidermoid cysts of skin.
    Pigmented lesions of the ocular fundus.
    Osteoblastoma



    A rare benign neoplasm of bone that arises from osteoblasts.
    Site: vertebral column, sacrum, calvarium, & long bones, bones of hands and feet.
    Mandible, posterior region.
    Age: majority below 30 years.
    Size: < 2 cm in diameter.
    Painful swelling ( not relieved by aspirin).
    Treatment
    Osteoid osteoma
    A rare benign neoplasm of bone that arises from osteoblasts.
    Contain a concentration of peripheral nerves.
    The tumor produces prostaglandins result in pain( nocturnal pain) relieved by aspirin.
    Size: > 2 cm.
    Age: children & adolescent.
    Site: femur, tibia, & phalanges, rarely jaws.
    Contain a concentration of peripheral nerves.
    The tumor produces prostaglandins result in pain( nocturnal pain) relieved by aspirin.
    Size: > 2 cm.
    Age: children & adolescent.
    Site: femur, tibia, & phalanges, rarely jaws.
    Treatment
    Local surgical excision.
    Chondroma
    Benign tumor of hyaline cartilage
    Age: 3rd -4th decades,
    Site: condyle, anterior maxilla.
    Painless slowly growing tumor with tooth mobility & root resorption.
       


  2. #2
    :
    : Jul 2008
    : 23
    : sudan
    :
    : 22
    : 2,715
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  4. #4
    : 2ta
    : Aug 2008
    : 75
    :
    : 20
    : 1,921
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  5. #5
    : 2ta
    : Aug 2008
    : 75
    :
    : 20
    : 1,921
    Array











    :
    1-
    - benign
    - malignant
    2-
    - epithelial cells
    - glandular cells
    - connective tissue




    :
    -
    * papilloma
    * adenoma
    * oma
    -
    * carcinoma
    * adenocarcinoma
    * sarcoma

       


  6. #6
    : 2ta
    : Aug 2008
    : 75
    :
    : 20
    : 1,921
    Array


    Classification :
    Based on tissue type
    :
    Benign oral epithelial tumors:



    squamous cell papilloma


    Tumors of bone:

    Osteoma, ossifying fibroma, osteoblastoma, osteoid osteoma.
    Tumors of cartilage:

    Chondroma

    Fibrous connective tissue tumors:

    fibroma

    Vascular & lymphatic tumors:

    hemangioma, vascular malformations.

    Neural tissue tumors:

    schwannoma, neurofibroma

    Tumors of muscles:

    leiomyoma
    , rhabdomyoma.

    Tumors of adipose tissues:

    lipoma.

    Uncertain origin:
    granular cell tumor.
    Squamous cell papilloma
       


  7. #7
    :
    : Oct 2009
    : 1156
    : sudan
    :
    : dentist
    : 10
    : 825
    Array

       

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