أورام حميدة في تجويف الفم

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Questions and Answers

ما هو العامل الذي تسبّب في ضمور؟

تعيين موعد لعملية جراحية

النقص في حجم العضلات

النقص في حجم الأنسجة (correct)

الجدية

هل يمكن أن يكون ورم lipochondroma خبيثًا؟

False

ما هو العضو الذي قد ينمو فيه ورم osteoma ؟

العظم

ما هو العامل الأساسي لتشخيص neurofibromatosis من النوع الأول ?

CAFE SPOT Signup and view all the answers

طابق الأورام الحميدة التالية مع مواقع ظهورها في الفم :

hemangioma of infancy = الفم neurofibroma = اللسان keratoacanthoma = الجلد والفم desmoid-type fibromatosis = الفم و الوجه و الرقبة Signup and view all the answers

ما هي الخصائص التشخيصية لـ keratoacanthoma?

زيادة النمو في الأسابيع الأربعة أولى ثم يكاد يتوقف النمو في الأسابيع الأربعة التالية ثم يختفي بعد ذلك Signup and view all the answers

هل neurofibromatosis هي مرض وراثي؟

True Signup and view all the answers

ما هي الخصائص الأساسية لورم fibroma?

هو ورم benign يُصيب النسيج الضام الليفي و هو أكثر الأورام انتشارًا. Signup and view all the answers

ما هي الخلايا التي تُشكل ورم schwannoma؟

خلايا Schwann Signup and view all the answers

ما هو الورم الذي يُصيب عظم الوجه و العظم الذي يُشكل الفك الأسفل و العظم الذي يُشكل الفك الأعلى و الذي يُشكل نهاية العظم الذي يُشكل الفك الأسفل؟

osteoma Signup and view all the answers

هل الورم desmoplastic fibroma خبيث؟

False Signup and view all the answers

ما هي الخصائص المُشخصة لـ hemangioma of infancy؟

هو الورم الأكثر انتشارًا بين الأطفال و يزداد حجمه في الشهور الأولى من الحياة ثم يقل حجمه مع مرور الوقت و يختفي في بداية الطفولة Signup and view all the answers

ما هو الورم الذي ينمو في النسيج الضام الليثي و يُشكل أكثر من 80% من حالات الأورام في الفم و الوجه و الرقبة؟

desmoid-type fibromatosis Signup and view all the answers

Is neurofibromatosis a malignant disease؟

False Signup and view all the answers

What are the characteristic symptoms of sturge-weber syndrome?

It is characterized by: port wine stains, associated intracranial lesions, neurologic manifestations. Signup and view all the answers

What are the characteristics of melanocytic nevi?

It is a tumor like malformation of skin or mucous membrane formed of cells native to the tissue. They are regarded as hamartomatous lesions. Signup and view all the answers

Study Notes

Benign Tumors of the Oral Cavity

A neoplasm is a new growth forming an abnormal mass of tissue, characterized by autonomy (independent growth), uncontrolled proliferation, and lack of regression or atrophy when the initiating factor is removed.

Classification of Neoplasms

Based on Histogenesis (Tissue Origin):
- Epithelial origin
- Mesenchymal origin
Based on Behavior:
- Benign origin
- Malignant origin

Differences Between Benign and Malignant Neoplasms

Clinical and Gross Appearance:
- Benign: Slow and gradual growth, expansile, infrequent ulceration, usually with intact surface.
- Malignant: Rapid growth, infiltrative, frequent ulceration due to necrosis and hemorrhage.
Metastasis:
- Benign: Never metastasizes.
- Malignant: Frequent metastasis.
Size:
- Benign: Smaller compared to malignant lesions
- Malignant: Larger compared to benign
Borders:
- Benign: Well-defined, smooth edges.
- Malignant: Ill-defined, irregular edges.
Fixation:
- Benign: Not fixed to surrounding tissues.
- Malignant: Fixed to surrounding tissues
Recurrence:
- Benign: Does not recur after surgical removal.
- Malignant: Often recurs.

Benign Epithelial Tumors

Squamous Cell Papilloma: A benign neoplasm of stratified squamous epithelium.
- Clinical Features: Exophytic growth, often finger-like projections, variable color and consistency.
- Histological Features: Hyperplastic stratified squamous epithelium.
Keratoacanthoma: Benign epithelial tumor resembling squamous cell carcinoma.
- Clinical Features: Elevated firm nodule with central keratin-filled crater, usually asymptomatic.
- Pathogenesis: Unknown but possibly related to UV radiation.
- Clinical Course: Usually regresses spontaneously within 6-8 weeks.
- Histological Features: Hyperplastic stratified squamous epithelium with keratin plugging, possible keratinocyte atypia.

Benign Mesenchymal Tumors

Fibroma: Benign tumor of fibrous connective tissue.
- Clinical Features: Most common oral cavity tumor, painless, may be from reactive hyperplasia.
- Histological Features: Dense fibrous tissue, with variable cellularity.
Desmoid-Type Fibromatosis: A locally infiltrative, non-metastasizing myofibroblastic neoplasm.
- Etiology: May be related to trauma, genetic dysregulation, or Gardner syndrome.
- Clinical Features: Painless swelling, may become large and invade surrounding structures.
Solitary Fibrous Tumor: A fibroblastic tumor often with a well-defined border and a prominent, branched staghorn vasculature.
- Clinical Features: Typically slow-growing, painless, and well-circumscribed in the oral cavity.
- Histological Features: Spindle cells arranged haphazardly, variable cellularity and collagen content, prominent staghorn vasculature.
Lipomas: Benign tumors of adipose tissue, often in deep oral sites.
- Clinical Features: Painless, often lobulated, yellowish masses.
- Histological Features: Formed of mature fat cells with clear cytoplasm, compressed nuclei, and cellular capsule.
Myomas: Benign tumors of smooth muscle (leiomyomas) or striated muscle (rhabdomyomas).
- Clinical Features: Painless, slow-growing masses.
- Histological Features: Smooth muscle cells arranged in interlacing bundles (leiomyoma) or striated muscle cells
Neural Tumors (Granular Cell Tumors, Neurofibromas, Schwannomas): Lesions of neural crest cell origin.
- Clinical Features: Usually slow-growing, painless nodules.
- Histological Features: vary by tumor type but could include sheets of large, round cells with granular cytoplasm (G.C.T), characteristic fascicles of spindle-shaped cells (N,), or a biphasic pattern with a cellular and acellular component (Schwannomas).
Vascular Tumors:
- Hemangioma of Infancy: Rapid growth phase, followed by involution
- Congenital Hemangioma: Present at birth, non-involuting and involuting types.
Vascular Malformations: Irregular development.
- Capillary: port-wine stain (Sturge-Weber Syndrome)
- Venous: blue dilated vein; usually present at birth.
- Lymphatic: Cystic hygroma, often multilocular cysts.
- Intrabony: a vascular malformation that can be found in the bone.
Melanocytic Nevi: Tumor-like pigmented lesions.
- Acquired: Common mole is a proliferation of nevus cells arising typically at the dermal-epidermal junction, intraoral lesions are uncommon.
- Congenital: Present at birth, can be small or very large
- Clinical features and histological features vary for each type
Maxillofacial Bone & Cartilage Tumors:
- Osteoma: Benign bone tumor, often solitary, well-defined radiological appearance.
- Osteochondroma: Cartilage-capped bony projection, usually arising from the cortex.
- Desmoplastic Fibroma: Locally aggressive bone tumor, often in the mandible

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يتناول هذا الاختبار أورام الفم الحميدة، وتصنيفها بناءً على المنشأ السليلي وسلوكها. كما يستعرض الفروق بين الأورام الحميدة والخبيثة من حيث النمو، والتأثير، والانتشار. تعد هذه المعلومات ضرورية لفهم طبيعة الأورام ومراقبتها في المجال الطبي.