Malignant Diseases Of The Jaws

Malignant Diseases of the Jaws

Definition & General Features

  • Malignant diseases typically affect individuals over 40 years of age.

  • Characterized by uncontrolled tissue growth, local invasiveness, cellular anaplasia, and the ability to metastasize.

  • Divided into primary tumors (arise de novo) and secondary (metastatic) malignancies originating from distant tumors.

Types of Malignant Tumors

  • Carcinomas: Most common, arising from epithelial tissue.

  • Sarcomas: Connective tissue malignancies, often affecting younger individuals (under 30).

  • Metastatic Tumors: Commonly involve prostate and breast cancers; bone-forming tumors like osteosarcoma and chondrosarcoma.

  • Hematopoietic System Malignancies: Include various blood cancers.

Causes of Malignant Diseases

  • Viruses

  • Radiation Exposure

  • Genetic Defects

  • Carcinogenic Chemicals (e.g., tobacco, alcohol addiction)

Clinical Features

  • Symptoms include:

    • Displaced or loosened teeth.

    • Foul smell, ulceration, indurated borders, oral pain, rapid swelling.

    • Sensory or motor neural deficits, lymphadenopathy, weight loss.

  • Oral cancers most often found in men over 50, but can occur at any age.

Radiographic Examination

  • Diagnostic imaging includes:

    • Intraoral and panoramic radiographs (best resolution).

    • Cone beam computed tomography (CBCT), PET scans, and MRI.

Radiographic Features

  • Location of tumors can vary:

    • Carcinomas primarily in the tongue, FOM, and gingiva.

    • Sarcomas in the mandible and posterior jaws.

    • Metastatic tumors commonly target the posterior mandible and maxilla.

  • Characteristics:

    • Ill-defined (irregular) borders, radiolucent.

    • Peripheral invasion and irregular shapes indicative of malignancy.

Differential Diagnosis

  • Conditions to differentiate include:

    • Osteomyelitis, odontogenic cysts, and multiple myeloma.

    • Notably, malignancies may mimic periodontal diseases initially.

Specific Tumor Types

Squamous Cell Carcinoma (SCC)

  • Most prevalent oral malignancy, associated with features such as:

    • White/red lesions, indurated borders, local pain, and extensive metastasis potential (to lymph nodes, lungs).

Central Mucoepidermoid Carcinoma

  • Presents as a painless swelling, well-defined radiographically.

Osteosarcoma

  • Malignant bone tumor, often presenting with swelling and pain, predominantly in the mandible.

Multiple Myeloma

  • Characterized by "punched-out" lesions in the bones, commonly presenting in the mandible.

Non-Hodgkin's Lymphoma & Burkitt's Lymphoma

  • Symptoms include weight loss, fever, and lymphadenopathy, with distinctive radiographic features.

Conclusion

  • Comprehensive management involves imaging, clinical evaluation, and sometimes surgical intervention. Regular follow-up and monitoring required for suspected malignancies.