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14. Salivary Gland diseases case 2_integrated

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Clinical Case Discussion Of Asymptomatic Mucosal Swelling

Patient Presentation and History1

A 40-year-old male presented with an asymptomatic mucosal swelling. The patient was unaware of the lesion’s presence; it was discovered coincidentally during a routine dental examination.

  • Medical History: Non-contributory.
  • Social History:
    • Smoker for 10 years (15 cigarettes per day).
    • Consumes 2 alcoholic drinks per day.

Case Description and Patient History

Clinical Case Activity

1. Identify the pathosis and describe the clinical features.

==Identification:==

  • The lesion is a red abnormality located on the palate.
  • It is a solitary, asymptomatic lesion.

==Clinical Description:==

  • ==Elevation: It is a raised, slightly elevated lesion (a lump).==
  • ==Consistency: It is a solid lesion rather than fluid-filled.==
  • ==Margins: It is well-defined.==
  • ==Symptoms: The patient was unaware of it; it is asymptomatic with no ulceration.==
  • ==Location Context: There are many minor salivary glands under the palatal mucosa in this area.==

2. What is the differential diagnosis?

  • Salivary Gland tumour such as pleomorphic adenoma or mucoepidermal carcinoma
    • Minor salivary gland tumors (e.g., Pleomorphic adenoma).
    • Warthin tumor (though noted as less common in this presentation).
    • Malignant salivary gland tumor (noting that these can be misleadingly well-defined and slow-growing).
  • pyogenic granuloma
  • Fibroepithelial polyp
    • Note: Though the lesion is not pedunculated.
  • Squamous cell carcinoma
  • ==Vascular/Red Lesions:==
    • Erythroplakia (less likely because erythroplakia is a red patch, whereas this is a raised lump).
  • ==Reactive/Inflammatory Lesions:==
    • Thermal burn (less likely as there is no edema or pain).

==Excluded Diagnoses:==

  • ==Lichen Planus: Ruled out because lichen planus presents as reticular or “cobblestone” patterns and is not typically a raised lump.==
  • ==Mucocele: Ruled out because the lesion is solid, whereas a mucocele is fluid-filled.==

3. What are the relevant clinical investigations?

most common locations for salivary gland tumours are upper lip and palate:

  • we want to do an incisional biopsy because:
    • a benign salivary gland tumour has a very different excision than a malignant one
    • This is the preferred investigation to determine if the lesion is benign or malignant, as this dictates the surgical approach.
  • histology:
    • cellular pleomorphism
    • hyperchromatism , dark staining
    • mucin collections
    • mucoepidermal tumour characteristics
    • Examination for duct-like structures and cystic spaces containing mucin.
    • Special staining to differentiate cell types.
    • low grade:
      • theres more mucin, which means its still well-differentiated
    • Assessment for invasion of bone or other structures.

4. What is the diagnosis?

  • ==Mucoepidermoid Carcinoma:==
    • The lesion is identified as a malignant salivary gland tumor.
    • ==Histological features: Presence of cystic components, epithelial cells, and mucin.==
    • ==Grading: Can range from low-grade (better prognosis, more mucin) to high-grade (poor prognosis, less differentiation).==

5. How would you manage this patient?

  • ==Surgery: The primary treatment is surgical excision.==
  • ==Surgical Planning: The extent of the excision depends on whether the biopsy shows a benign or malignant process.==
  • ==Adjunctive Therapy: Post-operative radiation may be used for more advanced cases, such as those with bone invasion or tumor spread.==

Footnotes

  1. Original PDF page 1: 14. Salivary gland disease case 2, p.1 ↩

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