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A Three-dimensional Tissue Culture Model to Study Primary Human Bone Marrow and its Malignancies
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Non-primary salivary malignancies: A 22-year retrospective study
Yair Israel1, Adi Rachmiel1, Konstantin Gourevich2
1Department of Oral and Maxillofacial Surgery, Rambam Medical Center, Faculty of Medicine, Rappaport Family Institute for Research in the Medical Sciences, Technion - Israel Institute of Technology, Haifa, 31096, Israel.
Summary
Non-primary salivary gland tumors are rare but significant. Systemic treatments like chemotherapy and radiotherapy improved survival more than surgery for these advanced cases.
Area of Science:
- Oncology
- Head and Neck Surgery
Background:
- Salivary gland malignancies are predominantly primary tumors.
- Non-primary tumors constitute a notable proportion (15%) of salivary gland malignancies in this medical center.
- The rarity of non-primary salivary tumors necessitates further investigation.
Purpose of the Study:
- To investigate the characteristics of non-primary malignant tumors of the salivary glands.
- To analyze demographic, clinical, diagnostic, and treatment parameters.
- To evaluate survival rates in patients with non-primary salivary gland malignancies.
Main Methods:
- Retrospective study of 119 salivary malignancy patients over 22 years.
- Analysis of demographic data, tumor type (skin cancer, solid tumors, hematological malignancies), concomitant malignancies, and patient history (smoking).
- Review of diagnostic methods (CT, FNA, PET-CT) and treatment modalities (surgery, chemotherapy, radiotherapy).
Main Results:
- 15% (18/119) of salivary malignancies were non-primary, all in the parotid gland.
- Common types included skin cancer (9), hematological malignancies (6), and solid tumors (3).
- Survival varied by tumor type, with lymphoma patients surviving and solid tumor patients succumbing despite therapy.
Conclusions:
- Systemic therapies (chemotherapy, radiotherapy) are more effective than surgery for prolonging life in non-primary salivary tumors with poor prognosis.
- Conservative management is recommended for patients with widespread metastases or systemic disease.
- Surgical debulking may offer palliative benefits in select cases.
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